ISUZU Trucks OBD fault codes list

Service technicians have no problem recognising breakdowns and carrying out machine diagnostics, ISUZU Trucks OBD fault codes list, plus they are familiar with equipment from a variety of manufacturers.

Isuzu Motors Ltd. is a Japanese commercial vehicle and diesel engine manufacturing company headquartered in Tokyo. Its principal activity is the production, marketing and sale of Isuzu commercial vehicles and diesel engines. The company also has a number of subsidiaries and joint ventures, including UD Trucks. Isuzu-branded vehicles are sold in most commercial markets worldwide. Isuzu’s primary market focus is on commercial diesel-powered truck, buses and construction. Isuzu diesel engines are used by dozens of vehicle manufacturers, including General Motors.

Full list of OBD II Diagnostic Trouble Codes for your Isuzu. If your Check engine light is on you may have a serious problem. Scan your codes and follow the chart to determine what the code means. Use the code information to help guide you in the right direction.

SENSORS TECHNICAL INFORMATION

AAT–Ambient Air Temperature;
AS–Accelerator Sensor;
BS–Boost Sensor;
CPS–Crankshaft Position Sensor;
ECT–Engine Coolant Temperature;
ES–Engine Speed;
FTS–Fuel Temperature Sensor;
PSP–Pre-Stroke;
RS–Rack Sensor/

ISUZU FRR, FSR, FTR & FVR OBD CODES

Chart 1 — System Diagnostic Procedure
Chart 2 — System Diagnostic Procedure
Chart 3 — System Diagnostic Procedure
Chart 4 — System Diagnostic Procedure
Chart 5 — System Diagnostic Procedure
Chart 6 — System Diagnostic Procedure
Chart 7/Code 13 — Rack Sensor Circuit Failure
Chart 8 — System Diagnostic Procedure
Chart 9/Code 15 — Engine Speed Sensor Circuit Failure
Chart 10/Code 23 — Engine Coolant Temperature Sensor Circuit Failure
Chart 11/Code 29 — Pre-Stroke Actuator Failure
Chart 12/Code 291 — Pre-Stroke Position Sensor Circuit Failure
Chart 13/Code 292 — Pre-Stroke Learning Failure
Chart 14/Code 293 — Power Cut Relay Circuit Failure
Chart 15 — System Diagnostic Procedure
Chart 16/Code 414 — Boost Cut Magnetic Valve Circuit Failure
Chart 17 — System Diagnostic Procedure
Chart 18/Code 423 — Pre-Stroke Power Supply Circuit Failure
Chart 19 — System Diagnostic Procedure
Chart 20 — System Diagnostic Procedure
Chart 21/Code 413 — Variable Swirl System Valve
Chart 22/Code 71 — Barometric Pressure Sensor
Chart 1 — Automatic Transmission Relay Output Error

Chart 2 — Exhaust Brake Relay Error
Chart 3 — MFAM Signal Error
Chart 4 — Power Supply System Inspection
Chart 5 — Tachometer Output Error
Chart 6 — Pressure Control Valve (PCV) Relay Error
Chart 7/Code 13 — Engine Hunting
Chart 8 — Startup Failure, No Initial Combustion
Chart 9/Code 15 — Startup Failure, Initial Combustion No Start
Chart 10/Code 23 — Startup Failure, Starts But Won’t Rev
Chart 11/Code 29 — Excessive White Or Blue Smoke
Chart 12/Code 291 — Excessive Black Smoke
Chart 13/Code 292 — Lack Of Power
Chart 14/Code 293 — Surging, Hesitation
Chart 15 — Engine Stalls
Chart 16/Code 414 — Engine Does Not Stop
Chart 17 — Idle Control Error
Chart 18/Code 423 — High Idle Engine Speed
Chart 19 — Pump Position (G) Sensor Error
Chart 20 — Crankshaft Position (NE) Sensor
Chart 21/Code 413 — Main Relay System Error
Chart 22/Code 71 — Atmospheric Temperature Sensor Error
Code P23 — Water Temperature (THW) Sensor Error
Code P24 — Accelerator Sensor Error 1 & 2
Code P32 — Boost Pressure Sensor High Boost Pressure Abnormal
Code P34 — Adjusted Data Record, No History Recorded
Code P35 — Analog Digital Conversion, CPU Monitoring IC & Charging Circuit Errors
Code P42 — High Boost Pressure Abnormal
Code P65 — Low Boost Pressure Abnormal
Code P71 — Atmospheric Pressure Sensor Error
Code P115 — Common Rail Pressure Sensor Output Fixed
Code P118 — Common Rail Pressure Abnormal, 1st & 2nd Stage
Code P151 — Common Rail Pressure Abnormal, Pump Over Pressure
Code P158 — Two Way Valve (TWV) Driving System Error
Code P159 — Two Way Valve (TWV) Driving System Error
Code P211 — Fuel Temperature (THF) Sensor Error
Code P217 — PCV1 or PCV2 Power Shortage
Code P218 — PCV1 or PCV2 Power Shortage
Code P226 — Injection Pump Pressure Supply Or Pressure Limiter Activation
Code P227 — Injection Pump Pressure Supply
Code P245 — Abnormal Common Rail Pressure, PC Sensor System
Code P247 — Pressure Control Valve (PCV1 Or PCV2) Disconnected Or Shorted To Ground
Code P248 — Pressure Control Valve (PCV1 Or PCV2) Disconnected Or Shorted To Ground
Code P261 — Cylinder Flow Dumper Activated
Code P262 — Cylinder Flow Dumper Activated
Code P263 — Cylinder Flow Dumper Activated
Code P264 — Cylinder Flow Dumper Activated
Code P265 — Cylinder Flow Dumper Activated
Code P266 — Cylinder Flow Dumper Activated
Code P271 — Two Way Valve (TWV) Side Disconnected
Code P272 — Two Way Valve (TWV) Side Disconnected
Code P273 — Two Way Valve (TWV) Side Disconnected
Code P274 — Two Way Valve (TWV) Side Disconnected
Code P275 — Two Way Valve (TWV) Side Disconnected
Code P276 — Two Way Valve (TWV) Side Disconnected
Code P421 — Pressure Control Valve (PCV) Relay System Error
Code P543 — Overrun Judgement

Isuzu 6HK1-TCOBD CODES

P0014 No CAM Sensor Pulse Input
P0015 No CKP Signal Detected
P0016 Crankshaft Position Camshaft Position Correlation
P0022 Ambient Air Temperature Sensor Voltage
P0023 ECT Sensor Voltage
P0024 Accelerator Pedal Position Sensor Voltage
P0027 Exhaust Throttle Control Valve Performance
P0032 Boost Pressure Sensor
P0034 EEPROM Data Not Written
P0035 Output Driver & Quad Driver Modules
P003A Turbocharger Boost Control Position Not Learned
P0042 Boost Pressure Signal High
P0045 Turbocharger Boost Control Solenoid Control Circuit
P0065 Boost Pressure Signal Low
P0071 BARO Sensor Voltage
P0079 Exhaust Throttle Control Valve Circuit Low/High Voltage
P0080 Exhaust Throttle Control Valve Circuit Low/High Voltage
P0087 Common Rail Pressure High
P0087 Fuel Rail Pressure Too Low
P0087 Fuel Rail Pressure Too Low/High
P0088 Common Rail Pressure High
P0088 Fuel Rail Pressure Too High
P0088 Fuel Rail Pressure Too Low/High
P0089 Fuel Pressure Regulator Performance
P0091 Pressure Control Valve Voltage Low
P0091 Fuel Pressure Regulator Solenoid 1 Control Circuit Low Voltage
P0091 Fuel Pressure Regulator Solenoid Control Circuit Low/High Voltage
P0092 Pressure Control Valve Voltage High
P0092 Fuel Pressure Regulator Solenoid 1 Control Circuit High Voltage
P0092 Fuel Pressure Regulator Solenoid Control Circuit Low/High Voltage
P0093 Fuel System Large Leak Detected
P0097 Intake Air Temperature Sensor 2 Circuit Low/High Voltage
P0098 Intake Air Temperature Sensor 2 Circuit Low/High Voltage
P0101 Mass Air Flow Sensor Performance
P0102 Mass Air Flow Sensor Circuit Low/High
P0103 Mass Air Flow Sensor Circuit Low/High
P0107 BARO Sensor Voltage Low
P0107 Barometric Pressure Sensor Circuit Low
P0108 BARO Sensor Voltage High
P0108 Barometric Pressure Sensor Circuit High Voltage
P0112 MAT Sensor Temperature High
P0112 Intake Air Temperature Sensor Circuit Low Voltage
P0112 Intake Air Temperature Sensor Circuit Low/High Voltage
P0113 MAT Sensor Temperature Low
P0113 Intake Air Temperature Sensor Circuit High Voltage
P0113 Intake Air Temperature Sensor Circuit Low/High Voltage
P0115 Common Rail Pressure Sensor Variation
P0116 Engine Coolant Temperature Sensor Performance
P0117 ECT Sensor Temperature High
P0117 Engine Coolant Temperature Sensor Circuit Low Voltage
P0117 Engine Coolant Temperature Sensor Circuit Low/High Voltage
P0118 Common Rail Pressure Sensor High
P0118 ECT Sensor Temperature Low
P0118 Engine Coolant Temperature Sensor Circuit High Voltage
P0118 Engine Coolant Temperature Sensor Circuit Low/High Voltage
P0126 Engine Coolant Temperature Insufficient For Stable Operation
P0128 Engine Coolant Temperature Below Thermostat Regulating Temperature
P0151 Common Rail Pressure Sensor Low
P0158 Two-Way Valve Circuit
P0159 Two-Way Valve Circuit
P0181 Fuel Temperature Sensor Performance
P0182 Fuel Temperature Sensor Temperature High
P0182 Fuel Temperature Sensor Circuit Low Voltage
P0182 Fuel Temperature Sensor Circuit Low/High Voltage
P0183 Fuel Temperature Sensor Temperature Low
P0183 Fuel Temperature Sensor Circuit High Voltage
P0183 Fuel Temperature Sensor Circuit Low/High Voltage
P0190 Common Rail Pressure Variation
P0191 Fuel Rail Pressure Sensor Performance
P0192 Fuel Rail Pressure Signal Circuit
P0192 Fuel Pressure Sensor Circuit Low Voltage
P0192 Fuel Rail Pressure Sensor Circuit Low/High Voltage
P0193 Fuel Rail Pressure Signal Circuit High
P0193 Fuel Rail Pressure Sensor Circuit High Voltage
P0193 Fuel Rail Pressure Sensor Circuit Low/High Voltage
P0201 Two-Way Valve Solenoid Circuit Open
P0201 Injector Solenoid Circuit Open
P0201 Cylinder No. 1 Fuel Injector
P0202 Two-Way Valve Solenoid Circuit Open
P0202 Injector Solenoid Circuit Open
P0202 Cylinder No. 2 Fuel Injector
P0203 Two-Way Valve Solenoid Circuit Open
P0203 Injector Solenoid Circuit Open
P0203 Cylinder No. 3 Fuel Injector
P0204 Two-Way Valve Solenoid Circuit Open
P0204 Injector Solenoid Circuit Open
P0204 Cylinder No. 4 Fuel Injector
P0205 Two-Way Valve Solenoid Circuit Open
P0205 Injector Solenoid Circuit Open
P0205 Cylinder No. 5 Fuel Injector
P0206 Two-Way Valve Solenoid Circuit Open
P0206 Injector Solenoid Circuit Open
P0206 Cylinder No. 6 Fuel Injector
P0211 Fuel Temperature Sensor Circuit
P0217 Pressure Control Valve Driving Voltage High
P0218 Pressure Control Valve Driving Voltage High
P0219 Engine Overrun
P0219 Engine Overspeed
P0219 Engine Overspeed
P0226 Idle Speed Not Controlled
P0227 Idle Speed Control Target Speed Not Controlled
P0234 High Boost Pressure Signal
P0234 Turbocharger Engine Overboost
P0234 Turbocharger Engine Overboost
P0237 Boost Pressure Low
P0237 Turbocharger Boost Sensor Circuit Low Voltage
P0237 Turbocharger Boost Sensor Circuit Low/High Voltage
P0238 Boost Pressure High
P0238 Turbocharger Boost Sensor Circuit High Voltage
P0238 Turbocharger Boost Sensor Circuit Low/High Voltage
P0245 Common Rail Pressure Sensor Voltage
P0247 Pressure Control Valve Low Driving Voltage
P0248 Pressure Control Valve Low Driving Voltage
P0261 Flow Damper/Injector No. 1
P0261 Injectors 1-6 Circuit Short Low Voltage
P0262 Flow Damper/Injector No. 2
P0263 Flow Damper/Injector No. 3
P0263 Uneven Injection
P0264 Flow Damper/Injector No. 4
P0264 Injectors 1-6 Circuit Short Low Voltage
P0265 Flow Damper/Injector No. 5
P0266 Flow Damper/Injector No. 6
P0266 Uneven Injection
P0267 Injectors 1-6 Circuit Short Low Voltage
P0269 Uneven Injection
P0270 Injectors 1-6 Circuit Short Low Voltage
P0271 Two-Way Valve Disconnected/Cylinder No. 1
P0272 Two-Way Valve Disconnected/Cylinder No. 2
P0272 Uneven Injection
P0273 Two-Way Valve Disconnected/Cylinder No. 3
P0273 Injectors 1-6 Circuit Short Low Voltage
P0274 Two-Way Valve Disconnected/Cylinder No. 4
P0275 Two-Way Valve Disconnected/Cylinder No. 5
P0275 Uneven Injection
P0276 Two-Way Valve Disconnected/Cylinder No. 6
P0276 Injectors 1-6 Circuit Short Low Voltage
P0278 Uneven Injection
P0299 Low Boost Pressure
P0299 Turbocharger Engine Under boost
P02E2 Intake Air Flow Valve Control Circuit Low/High Voltage
P02E3 Intake Air Flow Valve Control Circuit Low/High Voltage
P02E7 Intake Air Flow Valve Position Sensor Performance
P02E8 Intake Air Flow Valve Position Sensor Circuit Low/High Voltage
P02E9 Intake Air Flow Valve Position Sensor Circuit Low/High Voltage
P0335 No CKP Signal
P0335 No Crankshaft Position Signal
P0335 Crankshaft Position Sensor Circuit/Performance
P0336 Crankshaft Position Sensor Circuit/Performance
P0340 Camshaft Position Sensor Circuit/Performance
P0341 Camshaft Position Sensor Circuit/Performance
P0380 Glow Plug Circuit
P0382 Glow Plug Feedback Circuit Fault
P0385 No Auxiliary Engine RPM Sensor Signal
P0385 No Camshaft Position Signal
P0401 Exhaust Gas Recirculation Flow Insufficient
P0402 Exhaust Gas Recirculation Flow Excessive
P0403 Exhaust Gas Recirculation Solenoid Control Circuit
P0404 Exhaust Gas Recirculation Open Position Performance
P0409 Exhaust Gas Recirculation Position Sensor Performance
P040B Exhaust Gas Recirculation Temperature Sensor 1 Performance
P040C Exhaust Gas Recirculation Temperature Sensor 1 Circuit Low/High Voltage
P040D Exhaust Gas Recirculation Temperature Sensor 1 Circuit Low/High Voltage
P0416 Main Relay Remains Off
P0417 ECM Detects No Voltage On STA Input
P041B Exhaust Gas Recirculation Temperature Sensor 2 Performance
P041C Exhaust Gas Recirculation Temperature Sensor 2 Circuit Low Voltage
P041D Exhaust Gas Recirculation Temperature Sensor 2 Circuit Low Voltage
P0421 Pressure Control Valve Driving Voltage Abnormal
P042E Exhaust Gas Recirculation Closed Position Performance
P0506 Idle Speed Low/High
P0507 Idle Speed Low/High
P0543 Fuel Injection & Pressure Stop
P0545 Exhaust Gas Temperature Sensor 1 Circuit Low/High Voltage
P0546 Exhaust Gas Temperature Sensor 1 Circuit Low/High Voltage
P0601 Internal Microprocessor Integrity
P0601 Internal Microprocessor Integrity
P0601 Control Module Performance
P0602 Internal Microprocessor Integrity
P0602 Internal Microprocessor Integrity
P0602 Control Module Performance
P0603 Internal Microprocessor Integrity
P0603 Internal Microprocessor Integrity
P0603 Control Module Performance
P0604 Internal Microprocessor Integrity
P0604 Internal Microprocessor Integrity
P0604 Control Module Performance
P0605 Internal Microprocessor Integrity
P0605 Internal Microprocessor Integrity
P0605 Control Module Performance
P0606 Internal Microprocessor Integrity
P0606 Internal Microprocessor Integrity
P0606 Control Module Performance
P0607 Internal Microprocessor Integrity
P0607 Internal Microprocessor Integrity
P062F Control Module Performance
P0641 APP Sensor 1 Voltage
P0641 5 Volt Reference Circuit 1 Fault
P0642 5-Volt Reference 1 Circuit Low/High Voltage
P0643 5-Volt Reference 1 Circuit Low/High Voltage
P064C Glow Plug Module Control Performance
P0650 Malfunction Indicator Lamp Control Circuit
P0651 APP Sensor 2 Voltage
P0651 5 Volt Reference Circuit 2 Fault
P0652 5-Volt Reference 2 Circuit Low Voltage
P0653 5-Volt Reference 2 Circuit Low Voltage
P0687 Engine Controls Ignition Relay Control Circuit High Voltage
P0698 5-Volt Reference 3 Circuit Low/High Voltage
P0699 5-Volt Reference 3 Circuit Low/High Voltage
P1085 Fuel Supply Pump Protection/Exchange, Pressure Regulator 2 Performance
P1087 Pressure Control Valve Opening Timing
P1087 Fuel Rail Pressure Trim Too Low
P1088 Common Rail Pressure High
P1088 Fuel Rail Pressure Trim Too High
P1093 Fuel Rail Pressure Low During Power Enrichment
P1125 More Than One APP Sensor
P1125 Accelerator Pedal Position System
P1125 Accelerator Pedal Position System
P1259 Fuel Supply Pump Protection/Exchange, Pressure Regulator 2 Performance
P1261 CPU Internal Error
P1263 TWV Voltage Supply Circuit Shorted To Ground
P1263 Injector Positive Voltage Control Circuit Group 1 Low Voltage
P1264 TWV Voltage Supply Circuit Shorted To Battery Voltage
P1264 Injector Positive Voltage Control Circuit Group 1 High Voltage
P1265 TWV Voltage Supply Circuit Shorted To Ground
P1265 Injector Positive Voltage Control Circuit Group 2 Low Voltage
P1266 TWV Voltage Supply Circuit Short To Battery Voltage
P1266 Injector Positive Voltage Control Circuit Group 2 High Voltage
P1270 ECM Cannot Process APP Analog Data
P1271 APP Sensors 1 & 2 Out Of Range
P1271 Accelerator Pedal Position Sensor 1-2 Correlation
P1272 APP Sensors 2 & 3 Out Of Range
P1272 Accelerator Pedal Position Sensor 2-3 Correlation
P1273 APP Sensors 1 & 3 Out Of Range
P1273 Accelerator Pedal Position Sensor 1-3 Correlation
P1277 APP Sensor 1 Voltage Low
P1277 Accelerator Pedal Position Sensor 1 Circuit Low Voltage
P1278 APP Sensor 1 Voltage High
P1278 Acceleration Pedal Position Sensor 1 Circuit High Voltage
P1282 APP Sensor 2 Voltage Low
P1282 Accelerator Pedal Position Sensor 2 Circuit Low Voltage
P1283 APP Sensor 2 Voltage High
P1283 Accelerator Pedal Position Sensor 2 Circuit High Voltage
P1287 APP Sensor 3 Voltage Low
P1287 APP Sensor 3 Voltage High
P1287 Acceleration Pedal Position Sensor 3 Circuit Low Voltage
P1288 Accelerator Pedal Position Sensor 3 Circuit Low Voltage
P1291 Pressure Control Valve Voltage Low
P1292 Pressure Control Valve Voltage High
P1293 Injector Circuit Low to High Current Transition Time Bank 1
P1298 Pressure Control Valve Voltage Abnormal
P1471 DPF Regeneration Insufficient
P1600 Internal Microprocessor Integrity
P1600 Internal Microprocessor Integrity
P160B Injector Flow Rate Calibration Incorrect
P1621 Internal Microprocessor Integrity
P1621 Internal Microprocessor Integrity
P1627 Internal Microprocessor Integrity
P1627 Internal Microprocessor Integrity
P1646 APP Sensor 3 Circuit Voltage High/Low
P1646 5 Volt Reference 3 Circuit
P1680 Internal Microprocessor Integrity
P1680 Internal Microprocessor Integrity
P1681 Internal Microprocessor Integrity
P1681 Internal Microprocessor Integrity
P1683 Internal Microprocessor Integrity
P1683 Internal Microprocessor Integrity
P2002 Diesel Particulate Filter Low Efficiency
P2003 Mass Air Flow Sensor Circuit High Voltage
P2004 Mass Air Flow Sensor Circuit Low Voltage
P2005 Power Take Off Sensor Circuit High Voltage
P2007 Turbocharger Vane Position Sensor Circuit High Voltage
P2008 Intake Manifold Runner Control Solenoid Circuit
P2011 Injector Positive Voltage Control Circuit Group 3
P2012 Injector Positive Voltage Control Circuit Group 4
P2032 Exhaust Gas Temperature Sensor 2 Circuit Low/High Voltage
P2033 Exhaust Gas Temperature Sensor 2 Circuit Low/High Voltage
P2080 Exhaust Gas Temperature Sensor 1 Performance
P2084 Exhaust Gas Temperature Sensor 2 Performance
P20E2 Exhaust Temperature Sensor 1-2 Correlation
P2122 APP Sensor
P2123 APP Sensor
P2127 APP Sensor
P2128 APP Sensor
P2132 APP Sensor
P2133 APP Sensor
P2138 APP Sensor
P2139 APP Sensor
P2140 APP Sensor
P2146 Injector Positive Voltage Control Circuit
P2147 Injector Positive Voltage Control Circuit
P2148 Injector Positive Voltage Control Circuit
P2149 Injector Positive Voltage Control Circuit
P2150 Injector Positive Voltage Control Circuit
P2151 Injector Positive Voltage Control Circuit
P2199 Intake Air Temperature Sensor 1 – 2 Correlation
P2227 Barometric Pressure Sensor Performance
P2228 Barometric Pressure Sensor Circuit Low/High Voltage
P2229 Barometric Pressure Sensor Circuit Low/High Voltage
P244B Diesel Particulate Filter Differential Pressure Too High
P244C Catalyst Temperature Too Low During Regeneration
P2453 Diesel Particulate Filter Differential Pressure Sensor Performance
P2454 Diesel Particulate Filter Differential Pressure Sensor Circuit Low Voltage
P2455 Diesel Particulate Filter Differential Pressure Sensor Circuit Low Voltage
P2457 Exhaust Gas Recirculation Cooling System Performance
P2463 Diesel Particulate Filter Soot Accumulation
P254D Power Take-off Engine Speed Selector Sensor Circuit High Voltage
P2563 Turbocharger Boost Control Position Sensor Performance
P2564 Turbocharger Boost Control Position Sensor Circuit Low Voltage
P2564 Turbocharger Boost Control Position Sensor Circuit Low/High Voltage
P2565 Turbocharger Boost Control Position Sensor Circuit High Voltage
P2565 Turbocharger Boost Control Position Sensor Circuit Low/High Voltage
P2610 Internal Microprocessor Integrity
P2610 Internal Microprocessor Integrity
P268A Fuel Injector Calibration Data Not Programmed
P2900 Turbocharger Vane Position Sensor Performance
P2901 Exhaust Gas Recirculation Position Sensor Performance
P2902 Exhaust Gas Recirculation Open Position Performance
P2903 Exhaust Gas Recirculation Flow Insufficient
P2920 Engine Controls Ignition Relay Feedback Circuit
P2921 Fuel Rail Pressure Too High
P2922 Fuel Rail Pressure Too High
P2923 Fuel Rail Pressure Low During Power Enrichment
U2104 EBCM & TCM CAN Message Not Received By ECM
U2106 TCM CAN Message No Received By ECM
U2108 EBCM CAN Message Not Received By ECM

Isuzu 4HE1-TC OBD CODES

P13 — ECT Sensor High Voltage
P14 — ECT Sensor Low Voltage
P21 — Rack Sensor Low Voltage
P22 — Rack Sensor High Voltage
P23 — Magnetic Switch Control Low Voltage
P24 — Magnetic Switch Control High Voltage
P26 — QWS Relay Control High Voltage
P31 — EGR EVRV Solenoid Low Voltage
P32 — EGR EVRV Solenoid High Voltage
P33 — VSS Control Low Voltage
P34 — VSS Control High Voltage
P35 — EGR Quick Cut VSV Control Low Voltage
P36 — EGR Quick Cut VSV Control High Voltage
P41 — QOS Relay Control Low Voltage
P42 — QOS Relay Control High Voltage
P43 — Aneroid Compensator VSV Control Low Voltage
P44 — Aneroid Compensator VSV Control High Voltage
P45 — Engine Speed Sensor Low Voltage
P52 — EEPROM Error
P61 — Barometric Sensor Error

Isuzu NPR/W Series OBD Codes

— OBD System Check
— A/C Clutch Control Diagnosis
— Restricted Exhaust System Check
A-1 MIL
A-2 No Serial Data
A-3 Engine Cranks But Will Not Run
A-4 Injector Circuit Diagnosis
A-5 Fuel Pump Relay Circuit Diagnosis
A-6 Fuel System Diagnosis
A-7 Injector Balance Test (Central SFI)
Injector Balance Test (SFI)
A-8 Injector Coil Test
P0101 Mass Air Flow Sensor
P0102 Mass Air Flow Sensor Low Input
P0103 Mass Air Flow Sensor High Input
P0106 Manifold Absolute Pressure Sensor
P0107 Manifold Absolute Pressure Sensor Low Input
P0108 Manifold Absolute Pressure Sensor High Input
P0112 Intake Air Temperature Sensor Low Input
P0113 Intake Air Temperature Sensor High Input
P0117 Engine Coolant Temperature Sensor Low Input
P0118 Engine Coolant Temperature Sensor High Input
P0121 Throttle Position Sensor
P0122 Throttle Position Sensor Low Input
P0123 Throttle Position Sensor High Input
P0125 Engine Coolant Temperature Sensor
P0131 Heated Oxygen Sensor Low Input Bank 1 Sensor 1
P0132 Heated Oxygen Sensor High Input, Bank 1 Sensor 1
P0133 Heated Oxygen Sensor Slow Response Bank 1 Sensor 1
P0134 Heated Oxygen Sensor Insufficient Activity Bank 1 Sensor 1
P0135 Heated Oxygen Sensor Heater Circuit, Bank 1 Sensor 1
P0137 Heated Oxygen Sensor Low Input, Bank 1 Sensor 2
P0138 Heated Oxygen Sensor High Input, Bank 1 Sensor 2
P0140 Heated Oxygen Sensor Insufficient Activity Bank 1 Sensor 2
P0141 Heated Oxygen Sensor Heater Circuit, Bank 1 Sensor 2
P0151 Heated Oxygen Sensor Low Input, Bank 2 Sensor 1
P0152 Heated Oxygen Sensor High Input, Bank 2 Sensor 1
P0153 Heated Oxygen Sensor Slow Response, Bank 2 Sensor 1
P0154 Heated Oxygen Sensor Insufficient Activity Bank 2 Sensor 1
P0155 Heated Oxygen Sensor Heater Sensor, Bank 2 Sensor 1
P0157 Heated Oxygen Sensor Low Input, Bank 2 Sensor 2
P0158 Heated Oxygen Sensor High Input, Bank 2 Sensor 2
P0160 Heated Oxygen Sensor Insufficient Activity Bank 2 Sensor 2
P0161 Heated Oxygen Sensor Heater Circuit, Bank 2 Sensor 2
P0171 Fuel Trim System Lean Bank 1
P0172 Fuel Trim System Rich Bank 1
P0174 Fuel Trim System Lean Bank 2
P0175 Fuel Trim System Rich Bank 2
P0300 Engine Misfire Detected
P0301 Cylinder Misfire Detected
P0302 Cylinder Misfire Detected
P0303 Cylinder Misfire Detected
P0304 Cylinder Misfire Detected
P0305 Cylinder Misfire Detected
P0306 Cylinder Misfire Detected
P0307 Cylinder Misfire Detected
P0308 Cylinder Misfire Detected
P0325 Knock Sensor Module Circuit
P0327 Knock Sensor Circuit Low Input
P0336 Crankshaft Position Sensor
P0337 Crankshaft Position Sensor Low Output
P0338 Crankshaft Position Sensor High Output
P0339 Crankshaft Sensor Faulty Signal
P0340 Camshaft Position Sensor Circuit
P0341 Camshaft Position Sensor
P0401 Exhaust Gas Recirculation System
P0441 EVAP System
P0500 Vehicle Speed Sensor
P0506 Idle Air Control Low/High Input
P0507 Idle Air Control Low/High Input
P1106 Manifold Absolute Pressure High Input
P1107 Manifold Absolute Pressure Low Input
P1111 Intake Air Temperature Sensor High Input
P1112 Intake Air Temperature Sensor Low Input
P1114 Engine Coolant Temperature Sensor Low Input
P1115 Engine Coolant Temperature Sensor High Input
P1121 Throttle Position Sensor High Input
P1122 Throttle Position Sensor Low Input
P1133 Heated Oxygen Sensor Insufficient Switching Bank 1 Sensor 1
P1134 Heated Oxygen Sensor Transition Ratio, Bank 1 Sensor 1
P1153 Heated Oxygen Sensor Insufficient Switching, Bank 2 Sensor 1
P1154 Heated Oxygen Sensor Transition Time Ratio Bank 2 Sensor 1
P1345 Crankshaft Position/Camshaft Position Correlation
P1351 Ignition Control Circuit High Input
P1361 Ignition Control Circuit Low Input
P1380 Electronic Brake Control Module
P1381 Electronic Brake Control Module
P1406 Exhaust Gas Recirculation Valve
P1441 Evaporative Emissions System Flow
P1508 Idle Air Control System Low Or High RPM
P1509 Idle Air Control System Low Or High RPM
DIESEL FUEL INJECTION (DFI)
— Engine Cranks But Does Not Run
— Engine Starts & Stalls
— Malfunction Indicator Lamp Inoperative
— Malfunction Indicator Lamp Always On
— EGR Control
— Glow Control
— Cruise Control
— Symptom Test
P0087 Common Rail Pressure Low
P0088 Common Rail Pressure High
P0089 Fuel Pressure Regulator Performance
P0091 Suction Control Valve Voltage Low
P0092 Suction Control Valve High Voltage
P0102 Mass Air Flow Sensor Signal Low Voltage
P0103 Mass Air Flow Sensor Signal High Voltage
P0112 Intake Air Temperature Sensor Signal Low Voltage
P0113 Intake Air Temperature Sensor Signal Fault
P0117 Engine Coolant Temperature Sensor Signal Low Voltage
P0118 Engine Coolant Temperature Sensor Signal High Voltage
P0182 Fuel Temperature Sensor Signal Low Voltage
P0183 Fuel Temperature Sensor Signal High Voltage
P0192 Fuel Rail Pressure Sensor Signal Low Voltage
P0193 Fuel Rail Pressure Sensor Signal High Voltage
P0201 Injector Solenoid Coil Control Circuit Open
P0202 Injector Solenoid Coil Control Circuit Open
P0203 Injector Solenoid Coil Control Circuit Open
P0204 Injector Solenoid Coil Control Circuit Open
P0219 Engine Overrun Condition
P0234 High Boost Pressure Signal
P0237 Boost Pressure Low
P0238 Boost Pressure High
P0299 Engine Underboost
P0335 No Crankshaft Position Sensor Signal
P0340 No Camshaft Position Sensor Signal
P0382 Glow Plug Relay Control Circuit Open Or Shorted
P0400 EGR Valve Control Duty Cycle High
P0405 EGR Valve Control Duty Cycle Low
P0406 EGR Valve Position Signal High Voltage
P0500 No Vehicle Speed Sensor Signal
P0512 Starter Switch Signal High Voltage
P0562 Ignition Feed Circuit Low Voltage
P0563 Ignition Feed Circuit High Voltage
P0567 Cruise Resume/Accel Switch Signal High Voltage
P0568 Cruise Set /Coast Switch Signal High Voltage
P0571 Brake Switch Signals Out Of Correlation
P0602 Internal Microprocessor Integrity
P0606 Internal Microprocessor Integrity
P0642 5 Volt Reference Circuit 1 Low Voltage
P0643 5 Volt Reference Circuit 1 High Voltage
P0652 5 Volt Reference Circuit 2 Low Voltage
P0653 5 Volt Reference Circuit 2 High Voltage
P0686 ECM Main Relay High Voltage
P0698 5 Volt Reference 3 Low Voltage
P0699 5 Volt Reference 3 High Voltage
P1093 Fuel Pressure Oscilation Out Of Range
P1094 Fuel Injection Pump Flow Is High
P1125 Accelerator Position Sensor Open Circuit
P1261 Fuel Injector Charge Up Circuit Fault
P1263 Cylinder 1 Or 4 Fuel Injector Solenoid Control Circuit Shorted To Ground
P1264 Cylinder 1 Or 4 Fuel Injector Solenoid Control Circuit Shorted To Voltage
P1265 Cylinder 2 Or 3 Fuel Injector Solenoid Control Circuit Shorted To Ground
P1266 Cylinder 2 or 3 Fuel Injector Solenoid Control Circuit Shorted To Voltage
P1404 EGR Valve Position Sensor Signal High Voltage
P1593 Idle Up Volume Low Voltage
P1594 Idle Up Volume High Voltage
P1597 PTO Accelerator Sensor Signal High Voltage
P2122 APP Sensor 1 Low Voltage
P2123 APP Sensor 1 High Voltage
P2127 APP Sensor 2 Low Voltage
P2128 APP Sensor 2 Circuit High Voltage
P2132 APP Sensor 3 Circuit Low Voltage
P2133 APP Sensor 3 Circuit High Voltage
P2138 APP Sensors 1 & 2 Signal Out Of Range
P2139 APP Sensors 1 & 3 Signal Out Of Range
P2140 APP Sensors 2 & 3 Signal Out Of Range
P2152 Common 1 Injector Drive Circuit To Cylinders 1 & 4 Open
P2155 Common 2 Injector Drive Circuit To Cylinders 2 & 3 Open
P2228 BARO Sensor Signal Low Voltage
P2229 BARRO Sensor Signal High Voltage
P2293 Fuel Rail Pressure Too High
P2294 Fuel Rail Pressure Fault
U2104 CAN Communication BUS Message Lost
U2106 CAN Communication BUS Message Lost
MECHANICALLY INTEGRATED TIMING & INJECTION CONTROL SYSTEM (MITICS)
— Solenoid Switch Fault
— Exhaust Brake Fault
— EGR System Fault
— VSS System Fault
— Aneroid Compensator Fault
— QWS System Fault
— FICD System Fault
P13 ECT Sensor High Voltage
P14 ECT Sensor Low Voltage
P21 Rack Sensor Low Voltage
P22 Rack Sensor High Voltage
P23 Magnetic Switch Control Low Voltage
P24 Magnetic Switch Control High Voltage
P26 QWS Relay Control High Voltage
P31 EGR EVRV Solenoid Low Voltage
P32 EGR EVRV Solenoid High Voltage
P33 VSS Control Low Voltage
P34 VSS Control High Voltage
P35 EGR Quick Cut VSV Control Low Voltage
P36 EGR Quick Cut VSV Control High Voltage
P41 QOS Relay Control Low Voltage
P42 QOS Relay Control High Voltage
P43 Aneroid Compensator VSV Control Low Voltage
P44 Aneroid Compensator VSV Control High Voltage
P45 Engine Speed Sensor Low Voltage
P52 EEPROM Error
P61 Barometric Sensor Error
THROTTLE BODY INJECTION (TBI)
— On-Board Diagnostic System Check
— AP Output Check
— Pressure Switch Module Diagnosis
— A/C Request Signal Diagnosis
— Restricted Exhaust System Check
— Ignition System Check
— Knock Sensor System Check
— EGR System Check
— Idle Air Control System Check
— Idle Air Control System Check
A-1 No MIL
A-2 No DLC Data Or Will Not Flash DTC 12
A-3 Engine Cranks But Will Not Run
A-4 Injector Circuit Diagnosis
A-5 Fuel Pump Relay Circuit Diagnosis
A-6 Fuel System Diagnosis
13 Oxygen Sensor Circuit Open
14 ECT Sensor Circuit/High Temperature Indicated
15 ECT Sensor Circuit/Low Temperature Indicated
16 Vehicle Speed Sensor Buffer Fault
21 Throttle Position Sensor Circuit/Signal High Input
22 Throttle Position Sensor Circuit/Signal Voltage Low
24 Vehicle Speed Sensor/2WD
32 EGR System
33 MAP Sensor Circuit/Signal Voltage High-Low Vacuum
34 MAP Sensor Circuit/Signal Voltage Low-High Vacuum
42 Ignition Control
43 Knock Sensor Circuit
44 Oxygen Sensor Circuit/Lean Exhaust Indicated
45 Oxygen Sensor Circuit/Rich Exhaust Indicated
51 Faulty PROM (MEM-CAL)
53 System Over Voltage
55 Faulty PCM
54 Fuel Pump Circuit/Low Input

Isuzu 4HK1-TC OBD CODES

P0016 CKP & CMP Sensor Signals Out Of Range
P0087 Common Rail Pressure Low
P0088 Common Rail Pressure High
P0089 Fuel Pressure Regulator Performance
P0091 Suction Control Valve Voltage Low
P0103 Mass Air Flow Sensor Signal High Voltage
P0112 Intake Air Temperature Sensor Signal Low Voltage
P0113 Intake Air Temperature Sensor Signal Fault
P0116 Engine Coolant Temperature Sensor Signal Fault
P0117 Engine Coolant Temperature Sensor Signal Low Voltage
P0118 Engine Coolant Temperature Sensor Signal High Voltage
P0126 Engine Coolant Temperature Sensor Fault
P0128 Engine Coolant Temperature Fault
P0181 Fuel Temperature Sensor Fault
P0182 Fuel Temperature Sensor Signal Low Voltage
P0183 Fuel Temperature Sensor Signal High Voltage
P0192 Fuel Rail Pressure Sensor Signal Low Voltage
P0193 Fuel Rail Pressure Sensor Signal High Voltage
P0201 Injector Solenoid Coil No. 1 Control Circuit Open
P0202 Injector Solenoid Coil No. 2 Control Circuit Open
P0203 Injector Solenoid Coil No. 3 Control Circuit Open
P0204 Injector Solenoid Coil No. 4 Control Circuit Open
P0219 Engine Overrun Condition
P0234 High Boost Pressure Signal
P0237 Boost Pressure Low
P0238 Boost Pressure High
P0261 Injector Solenoid Coil Control Circuit Short
P0264 Injector Solenoid Coil Control Circuit Short
P0267 Injector Solenoid Coil Control Circuit Short
P0270 Injector Solenoid Coil Control Circuit Short
P0299 Engine Under boost
P0300 Engine Misfire
P0301 Fuel Injection Balancing Rate High
P0302 Fuel Injection Balancing Rate High
P0303 Fuel Injection Balancing Rate High
P0304 Fuel Injection Balancing Rate High
P0335 No Crankshaft Position Sensor Signal
P0340 No Camshaft Position Sensor Signal
P0341 Camshaft Position Sensor Missing Pulses
P0381 Glow Indicator Lamp Control Circuit Low Voltage
P0382 Glow Plug Relay Control Circuit Open Or Shorted
P0400 EGR Valve Control Duty Cycle High
P0401 EGR Flow Amount Insufficient
P0403 EGR Valve Control WPM Signal Fault
P0404 EGR Valve Control Duty Signal Error
P0405 EGR Valve Control Duty Cycle Low
P0406 EGR Valve Position Signal High Voltage
P0477 Exhaust Brake Control Relay Low Voltage
P0478 Exhaust Brake Control Relay High Voltage
P0500 No Vehicle Speed Sensor Signal
P0506 Idle Speed Lower Than Desired
P0507 Idle Speed High Than Desired
P0512 Starter Switch Signal High Voltage
P0562 Ignition Feed Circuit Low Voltage
P0563 Ignition Feed Circuit High Voltage
P0567 Cruise Resume/Accel
P0568 Cruise Set /Coast Switch Signal High Voltage
P0571 Brake Switch Signals Out Of Correlation
P0602 Internal Microprocessor Integrity
P0606 Internal Microprocessor Integrity
P0642 5 Volt Reference Circuit 1 Low Voltage
P0643 5 Volt Reference Circuit 1 High Voltage
P0650 MIL Control Circuit Low Voltage
P0652 5 Volt Reference Circuit 2 Low Voltage
P0653 5 Volt Reference Circuit 2 High Voltage
P0670 Glow Plug Controller System Voltage Too High Or Low
P0671 Glow Plug Controller Circuit No. 1 Open Or Short
P0672 Glow Plug Controller Circuit No. 2 Open Or Short
P0673 Glow Plug Controller Circuit No. 3 Open Or Short
P0674 Glow Plug Controller Circuit No. 4 Open Or Short
P0686 ECM Main Relay High Voltage
P0687 ECM Main Relay High voltage
P0698 5 Volt Reference 3 Low Voltage
P0699 5 Volt Reference 3 High Voltage
P0700 MIL Illumination Fault
P0802 MIL Request Circuit Open Or High Voltage
P1093 Fuel Pressure Oscillation Out Of Range
P1094 Fuel Injection Pump Flow Is High
P1125 Accelerator Position Sensor Open Circuit
P1261 Fuel Injector Charge Up Circuit Fault
P1263 Cylinder 1 Or 4 Injector Solenoid Control Circuit Shorted To Ground
P1264 Cylinder 1 Or 4 Injector Solenoid Control Circuit Shorted To Voltage
P1265 Cylinder 2 Or 3 Injector Solenoid Control Circuit Shorted To Ground
P1266 Cylinder 2 or 3 Injector Solenoid Control Circuit Shorted To Voltage
P1293 Injector Charge Up Circuit Insufficient Or Over Charge
P1404 EGR Valve Position Sensor Signal High Voltage
P1593 Idle Up Volume Low Voltage
P1594 Idle Up Volume High Voltage
P1597 PTO Accelerator Sensor Signal High Voltage
P1621 ECM Internal Fault
P2122 APP Sensor 1 Low Voltage
P2123 APP Sensor 1 High Voltage
P2127 APP Sensor 2 Low Voltage
P2128 APP Sensor 2 Circuit High Voltage
P2132 APP Sensor 3 Circuit Low Voltage
P2133 APP Sensor 3 Circuit High Voltage
P2138 APP Sensors 1 & 2 Signal Out Of Range
P2139 APP Sensors 1 & 3 Signal Out Of Range
P2140 APP Sensors 2 & 3 Signal Out Of Range
P2146 Common 1 Fuel Injector Drive Circuit Open
P2147 Cylinder 1 Or 4 Injector Solenoid Control Circuit shorted To Ground
P2148 Cylinder 1 Or 4 Injector Solenoid Control Circuit shorted To Voltage
P2149 Common 2 Fuel Injector Drive Circuit Open
P2150 Cylinder 2 Or 3 Injector Solenoid Control Circuit shorted To Ground
P2151 Cylinder 2 Or 3 Injector Solenoid Control Circuit shorted To Voltage
P2152 Common 1 Injector Drive Circuit To Cylinders 1 & 4 Open
P2155 Common 2 Injector Drive Circuit To Cylinders 2 & 3 Open
P2227 Difference Between BARO Pressure & Boost Pressure High
P2228 BARO Sensor Signal Low Voltage
P2229 BARO Sensor Signal High Voltage
P2293 Fuel Rail Pressure Too High
P2294 Fuel Rail Pressure Fault
U0073 CAN Bus OFF
U0101 CAN Bus OFF
U0106 CAN Bus OFF
U2104 CAN Communication BUS Message Lost
U2106 CAN Communication BUS Message Lost Diagnostic System Check
P0016 CKP & CMP Sensor Signals Out Of Range
P0027 Exhaust Throttle Control Valve Performance
P003A Turbocharger Boost Control Position Not Learned
P0045 Turbocharger Boost Control Solenoid Control Circuit
P0079 Exhaust Valve Control Circuit Low Voltage
P0080 Exhaust Valve Control Circuit High Voltage
P0087 Fuel Rail Pressure Too Low
P0088 Fuel Rail Pressure FRP Too High
P0089 Fuel Pressure Regulator Performance
P0091 Fuel Pressure Regulator Solenoid 1 Control Circuit Low Voltage
P0092 Fuel Pressure Regulator Solenoid 1 Control Circuit High Voltage
P0093 Fuel System Large Leak Detected
P0097 Intake Air Temperature Sensor Circuit 2 Low Voltage
P0098 Intake Air Temperature Sensor Circuit 2 High Voltage
P0101 Mass Air Flow Sensor Performance
P0102 Mass Air Flow Sensor Circuit Low Voltage
P0103 Mass Air Flow Sensor Circuit High Voltage
P0112 Intake Air Temperature Sensor 1 Circuit Low Voltage
P0113 Intake Air Temperature Sensor 1 Circuit High Voltage
P0116 Engine Coolant Temperature Sensor Performance
P0117 Engine Coolant Temperature Sensor Circuit Low Voltage
P0118 Engine Coolant Temperature Sensor Circuit High Voltage
P0126 Engine Coolant Temperature Insufficient For Stable Operation
P0128 Engine Coolant Temperature Below Thermostat Regulating Temperature
P0181 Fuel Temperature Sensor Performance
P0182 Fuel Temperature Sensor Circuit Low Voltage
P0183 Fuel Temperature Sensor Circuit High Voltage
P0191 Fuel Rail Pressure Sensor Performance
P0192 Fuel Rail Pressure Sensor Circuit Low Voltage
P0193 Fuel Rail Pressure Sensor Circuit High Voltage
P0201 Injector Control Circuit
P0202 Injector Control Circuit
P0203 Injector Control Circuit
P0204 Injector Control Circuit
P0219 Engine Overspeed
P0234 Turbocharger Engine Overboost
P0237 Turbocharger Boost Sensor Circuit Low Voltage
P0238 Turbocharger Boost Sensor Circuit High Voltage
P0261 Injector Control Circuit Low Voltage
P0264 Injector Control Circuit Low Voltage
P0267 Injector Control Circuit Low Voltage
P0270 Injector Control Circuit Low Voltage
P0299 Turbocharger Engine Underboost
P02E2 Intake Air Flow Control Circuit Low Voltage
P02E3 Intake Air Flow Control Circuit High Voltage
P02E7 Intake Air Flow Position Sensor Performance
P02E8 Intake Air Flow Position Sensor Circuit Low Voltage
P02E9 Intake Air Flow Position Sensor Circuit High Voltage
P0300 Engine Misfire Detected
P0301 Cylinder 1, 2, 3 or 4 Misfire Detected
P0302 Cylinder 1, 2, 3 or 4 Misfire Detected
P0303 Cylinder 1, 2, 3 or 4 Misfire Detected
P0304 Cylinder 1, 2, 3 or 4 Misfire Detected
P0335 Crankshaft Position Sensor Circuit
P0336 Crankshaft Position Sensor Performance
P0340 Camshaft Position Sensor Circuit
P0341 Camshaft Position Sensor Performance
P0381 Wait To Start Lamp Control Circuit
P0401 Exhaust Gas Recirculation Flow Insufficient
P0402 Exhaust Gas Recirculation Flow Excessive
P0403 Exhaust Gas Recirculation Solenoid Control Circuit
P0404 Exhaust Gas Recirculation Open Position Performance
P0405 Exhaust Gas Recirculation Position Sensor Circuit Low Voltage
P0406 Exhaust Gas Recirculation Position Sensor Circuit High Voltage
P040B Exhaust Gas Recirculation Temperature Sensor 1 Circuit Performance
P040C Exhaust Gas Recirculation Temperature Sensor 1 Circuit Low Voltage
P041D Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage
P0420 Catalyst System Low Efficiency
P042E Exhaust Gas Recirculation Closed Position Performance
P0500 Vehicle Speed Sensor Circuit
P0506 Idle Speed Low
P0507 Idle Speed High
P0512 Start Switch Circuit
P0522 Engine Oil Pressure Sensor Circuit Low Voltage
P0523 Engine Oil Pressure Sensor Circuit High Voltage
P0545 Exhaust Gas Temperature Sensor Circuit 1 Low Voltage
P0545 Exhaust Gas Temperature Sensor Circuit 1 Low Voltage
P0546 Exhaust Gas Temperature Sensor Circuit 1 High Voltage
P0562 System Voltage Low
P0563 System Voltage High
P0567 Cruise Control Resume Switch Circuit
P0568 Cruise Control Set Switch Circuit
P0571 Cruise Control Brake Switch Circuit
P0602 Control Module Not Programmed
P0606 Control Module Internal Performance
P062F Control Module Long Term Memory Performance
P0642 5 Volt Reference 1 Circuit Low Voltage
P0643 5 Volt Reference 1 Circuit High Voltage
P064C Glow Plug Control Module Performance
P0650 Malfunction Indicator Lamp Control Circuit
P0652 5 Volt Reference 2 Circuit Low Voltage
P0653 5 Volt Reference 2 Circuit High Voltage
P0671 Glow Plug Control Circuit
P0672 Glow Plug Control Circuit
P0673 Glow Plug Control Circuit
P0674 Glow Plug Control Circuit
P0687 Engine Controls Ignition Relay Control Circuit High Voltage
P0700 Transmission Control Module Request MIL Illumination
P0802 Transmission Control Module MIL Request Circuit
P1085 High Pressure Fuel Pump Performance
P1093 Fuel Rail Pressure Too Low
P1125 Accelerator Pedal Position System
P1259 High Pressure Fuel Pump Performance
P1293 Injector Positive Charge Up Control Circuit
P1471 Diesel Particulate Filter Regeneration Insufficient
P160B Fuel Injector Calibration Checksum Error
P2002 Diesel Particulate Filter Low Efficiency
P2032 Exhaust Gas Temperature Sensor 2 Circuit Low Voltage
P2033 Exhaust Gas Temperature Sensor 2 Circuit High Voltage
P2080 Exhaust Gas Temperature Sensor 1 Performance
P2084 Exhaust Gas Temperature Sensor 2 Performance
P20E2 Exhaust Gas Temperature Sensor 1 – 2 Correlation
P2122 Accelerator Pedal Position Sensor 1 Circuit Low Voltage
P2123 Accelerator Pedal Position Sensor 1 Circuit High Voltage
P2127 Accelerator Pedal Position Sensor 2 Circuit Low Voltage
P2128 Accelerator Pedal Position Sensor 2 Circuit High Voltage
P2138 Accelerator Pedal Position Sensor 1 – 2 Correlation
P2146 Injector Positive Voltage Control Circuit Group 1 Or 2
P2147 Injector Positive Voltage Control Circuit Group 1 Or 2 Low Voltage
P2149 Injector Positive Voltage Control Circuit Group 1 Or 2
P2148 Injector Positive Voltage Control Circuit Group 1 or 2 High Voltage
P2150 Injector Positive Voltage Control Circuit Group 1 Or 2 Low Voltage
P2151 Injector Positive Voltage Control Circuit Group 1 or 2 High Voltage
P2199 Intake Air Temperature Sensor 1 – 2 Correlation
P2227 Barometric Pressure Sensor Performance
P2228 Barometric Pressure Sensor Circuit Low Voltage
P2229 Barometric Pressure Sensor Circuit High Voltage
P244B Diesel Particulate Filter Differential Pressure Too High
P244C Diesel Particulate Filter Regeneration Duration
P2453 Diesel Particulate Filter Differential Pressure Sensor Performance
P2454 Diesel Particulate Filter Differential Pressure Sensor Circuit Low Voltage
P2455 Diesel Particulate Filter Differential Pressure Sensor Circuit High Voltage
P2457 Exhaust Gas Recirculation Cooling System Performance
P2463 Diesel Particulate Filter – Soot Accumulation
P254D Power Take Off Engine Speed Selector Sensor Circuit High Voltage
P2564 Turbocharger Boost Control Position Sensor Low Voltage
P2565 Turbocharger Boost Control Position Sensor High Voltage
P256C Engine Idle Speed Selector Sensor Low Voltage
P256D Engine Idle Speed Selector Sensor High Voltage
P268A Fuel Injector Calibration Not Programmed
U0073 Control Module Communication Bus Off
U0101 Lost Communication With TCM
U0106 Lost Communication With Glow Plug Control Module
U010C Turbocharger CAN Communication
U0294 Lost Communication With Data Recording Module

Isuzu Specific Check Engine Light Trouble Codes

Code	Description
P1106	– MAP Circuit Intermittent Voltage High
P1107	– MAP Circuit Intermittent Voltage Low
P1108	– Barometric Pressure Circuit Input High
P1111	– IAT Sensor Circuit Intermittent Voltage High
P1112	– IAT Sensor Circuit Intermittent Voltage Low
P1114	– ECT Sensor Circuit Intermittent Voltage Low
P1115	– ECT Sensor Circuit Intermittent Voltage High
P1121	– TP Sensor Circuit Intermittent Voltage High
P1122	– TP Sensor Circuit Intermittent Voltage Low
P1133	– H02S Insufficient Switching Bank 1 Sensor 1
P1134	– H02S Transition Time Ratio Bank 1 Sensor 1
P1153	– H02S Insufficient Switching Bank 2 Sensor 1
P1154	– H02S Transition Time Ratio Bank 2 Sensor 1
P1171	– Fuel System Lean During Acceleration
P1297	– Electrical Load Detector Circuit Input Low
P1298	– Electrical Load Detector Circuit Input High
P1300	– Random Misfire
P1336	– CKP System Variation Not Learned
P1359	– CKP/TDC Sensor Disconnected
P1361	– TDC Sensor Intermittent Interruption
P1362	– TDC Sensor No Signal
P1380	– ABS Rough Road System Fault
P1381	– Cylinder Position Sensor Intermittent Interruption, Misfire Detected (Except 1998 Rodeo)
P1381	– ABS Rough Road Class 2 Serial Data Fault Or Link Error (1998 Rodeo)
P1382	– Cylinder Position Sensor No Signal
P1390	– G Sensor Circuit Intermittent Voltage Low
P1391	– G Sensor Performance
P1392	– G Sensor Voltage Low
P1393	– G Sensor Voltage High
P1394	– G Sensor Intermittent Voltage High
P1404	EGR Valve Stuck Closed
P1406	– EGR Valve Pintle Position Circuit
P1441	– EVAP System Flow During Non-Purge
P1442	– EVAP Vacuum Switch Voltage High During Ignition On
P1459	– EVAP Emission Purge Flow Switch Malfunction
P1491	– EGR Valve Lift Insufficient Detected
P1498	– EGR Valve Lift Sensor Voltage High
P1508	– IAC System RPM Low
P1509	– IAC System RPM High
P1546	– A/C Compressor Clutch Output Circuit Malfunction
P1548	– A/C Compressor Clutch Output Circuit Malfunction
P1607	– PCM Internal Circuit Failure ‘‘A’’
P1618	– SPI Communications Error
P1625	– PCM Unexpected Reset
P1627	– PCM A/D Conversion Malfunction
P1635	– 5 Volt Reference Voltage Circuit Malfunction
P1640	– ODM 1 Input Voltage High (Except 1998 Rodeo)
P1640	– ODM Output ‘‘A’’ Circuit Fault (1998 Rodeo)
P1650	– Quad Driver Module ‘‘A’’ Fault
P1790	– Trans ROM Checksum Error
P1792	– Trans EEPROM Checksum Error
P1835	– Trans Kickdown Switch Malfunction
P1850	– Brake Band Apply Solenoid Malfunction
P1860	– TCC PWM Solenoid Circuit Failure
P1870	– Transmission Component Slipping