Service technicians have no problem recognising breakdowns and carrying out machine diagnostics, General Motors GM OBDII Fault Codes, plus they are familiar with equipment from a variety of manufacturers.
GM OBDII DTC
P1031 H02 Sensor Heater Control Circuit Problem
P1032 HO2S Heater Warm Up Control Circuit Banks 1 and 2 Sensor 1
P1079 Flexible Fuel Sensor Circuit High Input
P1105 Secondary Vacuum Sensor Circuit
P1106 MAP Sensor Circuit Intermittent High or Low Voltage
P1107 MAP Sensor Circuit Intermittent Voltage Low
P1108 BARO to MAP Signal Circuit Comparison Too High
P1109 Secondary Port Throttle System
P1111 IAT Sensor Circuit Intermittent Voltage High
P1112 IAT Sensor Circuit Intermittent Voltage Low (except Catera)/Intake Plenum Switchover
Valve Control (Catera)
P1113 Intake Resonance Switchover Valve Control
P1114 ECT Sensor Circuit Intermittent Voltage Low
P1115 ECT Sensor Circuit Intermittent Voltage High
P1116 ECT Signal Unstable or Intermittent
P1117 Engine Coolant Temp. Signal Out-Of-Range Low
P1118 Engine Coolant Temp. Signal Out-Of-Range High
P1119 ECT Signal Out-Of-Range With TFT Sensor
P1120 Throttle Positioning Sensor 1 Circuit
P1121 Throttle Positioning Sensor 1,2 Circuit Performance/ Fuel Injector Secondary System
Circuit Low
P1122 TPS Circuit Intermittent Voltage Low
P1125 APP System
P1130 HO2S Circuit Low Variance Bank 1 Sensor 1
P1131 HO2S Circuit Low Variance Bank 1 Sensor 2
P1132 HO2S Circuit Low Variance Bank 2 Sensor 1
P1133 HO2S/O2S Insufficient Switching Sensor 1 Or Bank 1 Sensor 1
P1134 HO2S Transition Time Ratio Bank 1 Sensor 1
P1135 HO2S Lean Mean Bank 1 Sensor 1
P1136 HO2S Rich Mean Bank 1 Sensor 1
P1137 HO2 Sensor Low Voltage During Power Enrichment
P1138 HO2 Sensor High Voltage During Decel Fuel Cutoff
P1139 HO2S Insufficient Switching Bank 1 Sensor 2
P1140 HO2S Transition Time Ratio Bank 1 Sensor 2
P1141 HO2 Sensor Heater Control Circuit (Bank 1 Sensor 2)
P1143 HO2S Bank 1 Sensor 3 Lean System or Low Voltage
P1144 HO2S Bank 1 Sensor 3 Rich or High Voltage
P1145 HO2S Cross Counts Bank 1 Sensor 3
P1153 HO2S Insufficient Switching Bank 2 Sensor 1
P1154 HO2S Transition Time Ratio Bank 2 Sensor 1
P1155 HO2S Lean Mean Bank 2 Sensor 1
P1156 HO2S Rich Mean Bank 2 Sensor 1
P1157 HO2S Bank 2 Sensor 2 Lean System or Low Voltage
P1158 HO2 Sensor Shift Rich (Bank 2 Sensor 2)/ Engine Metal Over-Temperature Protection
P1159 HO2S Cross Counts Bank 2 Sensor 2
P1161 HO2 Sensor Heater Control Circuit (Bank 2 Sensor 2)
P1163 HO2S Bank 2 Sensor 3 Lean System or Low Voltage
P1164 HO2S Bank 2 Sensor 3 Rich or High Voltage
P1165 HO2S Cross Counts Bank 2 Sensor 3
P1170 Bank to Bank Fuel TrimOffset
P1171 Fuel System Lean During Acceleration
P1185 Engine Oil Temperature Circuit
P1186 EOT Circuit Performance
P1187 Engine Oil Temperature Sensor Circuit Voltage Low (except 1997 Corvette)/Engine Oil
Pressure Sensor Circuit Voltage Low (1997 Corvette)
P1188 Engine Oil Temperature Sensor Circuit Voltage High (except 1997 Corvette)/Engine Oil
Pressure Sensor Circuit Voltage High (1997 Corvette)
P1189 Engine Oil Pressure Switch Circuit
P1191 Intake Air Duct Air Leak
P1200 Injector Control Circuit
P1201 (Alt. Fuel) Gas Mass Sensor Circuit Range/Performance
P1202 (Alt. Fuel) Gas Mass Sensor Circuit Low Frequency
P1203 (Alt. Fuel) Gas Mass Sensor Circuit High Frequency
P1211 Mass Air Flow Circuit Intermittent High
P1212 Mass Air Flow Circuit Intermittent Low
P1214 Injection Pump Timing Offset
P1215 Generator Driver Circuit
P1216 Fuel Solenoid Response Time Too Short
P1217 Fuel Solenoid Response Time Too Long
P1218 Injection Pump Calibration Circuit
P1220 Throttle Position (TP) Sensor 2 Circuit Fault
P1221 TP Sensor 1, 2 Performance
P1222 Injector Control Circuit Intermittent
P1225 Injector Circuit Cylinder 2 Intermittent
P1228 Injector Circuit Cylinder 3 Intermittent
P1231 Injector Circuit Cylinder 4 Intermittent
P1234 Injector Circuit Cylinder 5 Intermittent
P1237 Injector Circuit Cylinder 6 Intermittent
P1240 Injector Circuit Cylinder 7 Intermittent
P1243 Injector Circuit Cylinder 8 Intermittent
P1245 Intake Plenum Switchover Valve
P1250 Early Fuel Evaporative (EFE) Heater Circuit
P1257 Boost Control Condition/Supercharge System Overboost
P1258 Engine Coolant Overtemperature – Protection Mode Active
P1260 Fuel Pump Speed Relay Control Circuit
P1271 Accelerator Pedal Position Sensor 1-2 Correlation
P1272 Accelerator Pedal Position Sensor 2-3 Correlation
P1273 ccelerator Pedal Position Sensor 1-3 Correlation
P1274 Injectors Wired Incorrectly
P1275 Boost Control Condition (except 1997-98 Corvette)/Accelerator Pedal Positioning (APP)
Sensor 1 Circuit (1997-98 Corvette)
P1276 Accelerator Pedal Positioning (APP) Sensor 1 Circuit Performance
P1277 Accelerator Pedal Position Sensor 1 Circuit Low Voltage
P1278 Accelerator Pedal Position Sensor 1 Circuit High Voltage
P1280 Accelerator Pedal Positioning (APP) Sensor 2 Circuit
P1281 Accelerator Pedal Positioning (APP) Sensor 2 Circuit Performance
P1282 Accelerator Pedal Position Sensor 2 Circuit Low Voltage
P1283 Accelerator Pedal Position Sensor 2 Circuit High Voltage
P1285 Accelerator Pedal Positioning (APP) Sensor 2 Circuit
P1286 Accelerator Pedal Positioning (APP) Sensor 2 Circuit Performance
P1287 Accelerator Pedal Position Sensor 3 Circuit Low Voltage
P1288 Accelerator Pedal Position Sensor 3 Circuit High Voltage
P1300 Ignition Coil 1 Primary Feedback Circuit
P1305 Ignition Coil 2 Primary Feedback Circuit
P1310 Ignition Coil 3 Primary Feedback Circuit
P1315 Ignition Coil 4 Primary Feedback Circuit
P1320 ICM 4X Reference Circuit Too Many Pulses (except 1996-98 4.0L)/ICM 4X Reference
Circuit Intermittent No Pulses (1996-98 4.0L)
P1321 Electronic Ignition System Fault Line
P1322 EI System or Ignition Control Extra or Missing
P1323 ICM 24X Reference Circuit Low Frequency
P1324 Crank RPM Too Low
P1335 Crankshaft Positioning Sensing Circuit
P1336 CKP System Variation Not Learned
P1345 Camshaft To Crankshaft Position Correlation Fault
P1346 CKP Sensor System Variation Not Learned/ Intake Camshaft Position Performance
P1349 Intake Camshaft Position System
P1350 Ignition Control System
P1351 Ignition Control Circuit Voltage High (except 1998 3.1L)/Ignition Control Circuit Open
(1998 3.1L)
P1352 Bypass Circuit Open Or Voltage High/IC Output High/Pulse Detected when GND_Cyl.
2
P1353 IC Output High/Pulse Detected when GND_Cyl. 3
P1354 IC Output High/Pulse Detected when GND_Cyl. 4
P1355 IC Output High/Pulse Detected when GND_Cyl. 5
P1356 IC Output High/Pulse Detected when GND_Cyl. 6
P1357 IC Output High/Pulse Detected when GND_Cyl. 7
P1358 IC Output High/Pulse Detected when GND_Cyl. 8
P1359 Ignition Coil Group 1 Control Circuit
P1360 Ignition Coil group 2 Control Circuit
P1361 IC Circuit Not Toggling/ Ignition Control Circuit Voltage Low (Distributor Ignition)
P1362 Bypass Circuit Shorted Or Voltage Low
P1363 IC Cylinder 3 Not Toggling After Enable
P1364 IC Cylinder 4 Not Toggling After Enable
P1365 IC Cylinder 5 Not Toggling After Enable
P1366 IC Cylinder 6 Not Toggling After Enable
P1367 IC Cylinder 7 Not Toggling After Enable
P1368 IC Cylinder 8 Not Toggling After Enable
P1370 ICM 4X Reference Too Many Pulses
P1371 ICM 4X Reference Too Few Pulses (except Caprice, Fleetwood, Impala SS &
Roadmaster)/Distributor Ignition Low Resolution Circuit (Caprice,Fleetwood, Impala SS &
Roadmaster)
P1372 CKP Sensor A-B Correlation
P1374 3X Reference Circuit
P1375 ICM 24X Reference Voltage Too High
P1376 Ignition Ground Circuit
P1377 ICM Cam Pulse To 4X Reference Pulse Comparison
P1380 ABS/EBCM/EB(T)CM DTC Detected/Rough Road Data Unusable
P1381 Misfire Detected No EBCM/EB(T)CM/PCM Serial Data
P1390 Wheel Speed Sensor 1 – G – Sensor Circuit
P1391 Wheel Speed Sensor 1 – G – Sensor Circuit Performance
P1392 Wheel Speed Sensor 1 – G – Sensor Circuit Low Voltage
P1393 Wheel Speed Sensor 1 – G – Sensor Circuit High Voltage
P1394 Wheel Speed Sensor 1 – G – Sensor Circuit Intermittent
P1395 Wheel Speed Sensor 2 – G – Sensor Circuit
P1396 Wheel Speed Sensor 2 – G – Sensor Circuit Performance
P1397 Wheel Speed Sensor 2 – G – Sensor Circuit Low Voltage
P1398 Wheel Speed Sensor 2 – G – Sensor Circuit High Voltage
P1399 Wheel Speed Sensor 2 – G – Sensor Circuit Intermittent
P1401 Exhaust Gas Recirculation (EGR) flow test fault
P1403 EGR Error
P1404 EGR Valve Closed Pintle Position/EGR Valve Stuck Open Or Circuit Performance
P1405 EGR Error
P1406 EGR Valve Pintle Position Circuit
P1407 EGR Air Intrusion in Exhaust Supply to EGR Valve
P1408 MAP Sensor Circuit
P1409 EGR Vacuum System Leak
P1410 Fuel Tank Pressure System
P1415 AIR System Bank 1
P1416 AIR System Bank 2
P1418 Secondary Air Injection System Relay A Control Circuit High
P1420 Intake Air Low Pressure Switch Circuit Low Voltage
P1421 Intake Air Low Pressure Switch Circuit High Voltage
P1423 Intake Air High Pressure Switch Circuit High Voltage
P1431 Fuel Level Sensor 2 Circuit Performance
P1432 Fuel Level Sensor 2 Circuit Voltage Low
P1433 Fuel Level Sensor 2 Circuit Voltage High
P1441 EVAP System Flow During Non-Purge
P1442 EVAP Vacuum Switch Circuit
P1450 BARO Sensor Circuit
P1451 BARO Sensor Circuit
P1460 Cooling Fan Circuit (except Catera)/Misfire Detected With Low Fuel (Catera)
P1480 Cooling Fan 1 Control Circuit High
P1483 Engine Cooling System Performance
P1500 Starter Signal Circuit
P1501 Theft Deterrent System
P1502 Theft Deterrent System No Password Received
P1503 Theft Deterrent System Password Improper
P1504 Vehicle Speed Output Circuit
P1508 Idle Air Control (IAC) System Low RPM
P1509 IAC System High RPM
P1510 Back-Up Power Supply
P1511 Throttle Control System- Backup System Performance
P1514 TAC System MAF Performance
P1515 Command vs Actual Throttle Position Performance (PCM)
P1516 Command vs Actual Throttle Position Performance (TAC Module)
P1517 TAC Module Processor
P1518 PCM To TAC Module Serial Data Circuit
P1519 Throttle Actuator Control Module
P1520 Park/Neutral Position Switch Circuit, Gear Indicator System
P1521 Transmission Engaged at High Throttle Angle
P1522 Park/Neutral to Drive/Reverse at High RPM
P1523 Throttle Closed Position Performance
P1524 TPS Learned Closed Throttle Angle Degrees Out Of Range
P1525 Throttle Body ServiceRequired
P1526 TPS Learn Not Completed
P1527 Trans Range/Pressure Switch Comparison
P1528 Governor
P1529 Heated Windshield Request Problem
P1530 Ignition Timing Adjustment Switch Circuit/ A/C Refrigerant Pressure Sensor Error
P1531 Low Air Conditioning Refrigerant Charge
P1532 A/C Evaporator Temperature Circuit Voltage Low
P1533 A/C Low Side Temperature Sensor Circuit
P1534 A/C High Side Temp. Sensor Low Voltage
P1535 A/C/ High Side Temperature Sensor Circuit
P1536 A/C System ECT Overtemperature
P1537 A/C Request Circuit Voltage Low
P1538 A/C Request Circuit Voltage High
P1539 A/C High Pressure Switch Circuit Voltage High
P1540 A/C System High Pressure
P1541 A/C High Side Over Temperature
P1542 A/C System High Pressure/High Temperature
P1543 A/C System Performance
P1544 A/C Refrigerant Condition Very Low
P1545 A/C Clutch Relay Control Circuit
P1546 A/C Clutch Relay Control Circuit Voltage Low (except 1996-98 Camaro/Firebird &
1997-98 Corvette)/ A/C Clutch Status Circuit Voltage Low (1996-98 Camaro/ Firebird & 1997-98
Corvette)
P1547 A/C System Performance Degraded
P1548 A/C Recirculation Circuit
P1550 Stepper Motor Speed Control
P1554 Speed Control Status Circuit
P1555 Electronic Variable Orifice Fault (Saturn)
P1558 Speed Control (SPS Low)
P1559 Cruise Control Power Management Mode
P1560 Speed Control System/Transaxle Not In Drive
P1561 Speed Control Vent Solenoid
P1562 Speed Control Vacuum Solenoid
P1563 Cruise Vehicle Speed/Set Speed Difference Too High
P1564 Speed Control System/Vehicle Acceleration Too High (except Catera)/ECM Battery
Voltage Loss (Catera)
P1565 Speed Control Servo Position Sensor
P1566 Speed Control System/Engine RPM Too High
P1567 Speed Control Switches/ABCS Active
P1568 Speed Control (SPS High)
P1569 Cruise Servo Stroke High While not in Cruise
P1570 Speed Control System/Traction Control Active
P1571 TCS Desired Torque Circuit (except 4.0L, 4.6L & 1997-98 5.7L Corvette)/Traction
Control System PWM Circuit No Frequency (4.0L & 4.6L)/ASR Desired Torque (1997-98 5.7L
Corvette)
P1572 Traction Control System Active Circuit Voltage Low Too Long
P1573 PCM/EBTCM Serial Data Circuit/ Engine Hot Lamp Control Circuit
P1574 EBTCM System/Stop Lamp Circuit Voltage High (except 1997-98 Corvette)/Stop Lamp
Control Circuit (1997-98 Corvette)
P1575 Extended Travel Brake Switch Circuit Voltage High
P1576 Brake Booster Vacuum Sensor Circuit Voltage High
P1577 Brake Booster Vacuum Sensor Circuit Voltage Low
P1578 Brake Booster Vacuum Sensor Circuit Low Vacuum
P1579 Park/Neutral To Drive/Reverse At High Throttle Angle
P1580 Cruise Control Module Move Circuit, Low Voltage
P1581 Cruise Control Module Move Circuit, High Voltage
P1582 Cruise Control Module Direction Circuit, Low Voltage
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