Posted in Navistar

Navistar Diagnostic Trouble Codes List

Navistar International Corporation is an American holding company created in 1986 as the successor to International Harvester. Navistar operates as the owner of International brand of trucks and diesel engines. The company also produces buses under the IC Bus brand. On July 1, 2021, Navistar became a wholly owned subsidiary of Traton, and therefore part of the Volkswagen Group.


Navistar DTC Codes List

DTC Circuit Condition Description
111 ECM No errors detected – flash code only
112 ECM PWR Electrical system voltage B+ out-of-range high
113 ECM PWR Electrical system voltage B+ out-of-range low
114 ECT Engine Coolant Temperature signal out-of-range low
115 ECT Engine Coolant Temperature signal out-of-range high
121 MAP Intake Manifold Absolute Pressure signal out-of-range high
122 MAP Intake Manifold Absolute Pressure signal out-of-range low
123 MAP Intake Manifold Absolute Pressure signal in-range fault
124 ICP Injection Control Pressure signal out-of-range low
125 ICP Injection Control Pressure signal out-of-range high
126 BCP Engine Brake Control Pressure signal out-of-range low
127 BCP Engine Brake Control Pressure signal out-of-range high
131 APS/IVS APS signal out-of-range low
132 APS/IVS APS signal out-of-range high
133 APS/IVS APS signal in-range DTC
134 APS/IVS APS signal and IVS disagree
135 APS/IVS Idle Validation Switch circuit fault
136 EFP Engine Fuel Pressure signal out-of-range low
137 EFP Engine Fuel Pressure signal out-of-range high
141 VVS Vehicle Speed Sensor signal out-of-range low
142 VVS Vehicle Speed Sensor signal out-of-range high
143 CMP Incorrect CMP signal signature
145 CMP CMP signal inactive
146 CKP CKP signal inactive
147 CKP Incorrect CKP signal signature
151 BAP Barometric Absolute Pressure signal out-of-range high
152 BAP Barometric Absolute Pressure signal out-of-range low
153 WIF Barometric Absolute Pressure signal out-of-range low
154 IAT Inlet Air temperature signal out-of-range low
155 IAT Inlet Air temperature signal out-of-range high
161 MAT Manifold Air Temperature Signal out-of-range low
162 MAT Manifold Air Temperature Signal out-of-range high
163 EGR Exhaust Gas Recirculation Valve Position Signal out-of-range low
211 EOP Engine Oil Pressure signal out-of-range low
212 EOP Engine Oil Pressure signal out-of-range high
215 VSS Vehicle Speed Sensor signal frequency out-of-range high
225 EOP EOP sensor signal in-range fault
231 ATA ATA data communication link error
236 ELC ECL switch circuit fault
241 IPR Injection Control Pressure regulator OCC self test failed
246 EFAN Engine Fan – OCC self test fault
247 BSV Engine Brake enable OCC self test failed
251 IAH Inlet Air Heater OCC self test failed
256 RSE Variable Geometry Turbo control OCC self test failed
267 ECI Engine Crank Inhibit OCC self test failed
311 EOT Engine Oil Temperature signal out-of-range low
312 EOT Engine Oil Temperature signal out-of-range high
313 EWPS Engine Oil Pressure below warning level
314 EWPS Engine Oil Pressure below critical level
315 EWPS Engine speed above warning level
316 EWPS Engine Coolant Temperature unable to reach commanded set point
321 EWPS Engine Coolant Temperature above warning level
322 EWPS Engine Coolant Temperature above critical level
323 EWPS Engine Coolant Level below warning/critical level
324 IST Idle Shutdown Timer enabled engine shutdown
325 EWPS Power reduced, matched to cooling system performance
331 ICP SYS Injection Control Pressure above system working range
332 ICP Injection Control Pressure above spec. with engine not running
333

ICP SYS

 Injection Control Pressure above/below desired level
334

ICP SYS

 ICP unable to achieve setpoint in time (poor performance)
335

ICP SYS

 ICP unable to build pressure during cranking
341 EBP Exhaust Back Pressure signal out-of-range low
342 EBP Exhaust Back Pressure signal out-of-range high
343 AMS Excessive exhaust back pressure (gauge)
344 EBP Exhaust back pressure above spec. when engine off
345 AMS Faults detected during VGT portion of the AMS Test
346 AMS Faults detected during EGR portion of the AMS Test
351 AMS Change in exhaust back pressure did not occur when expected
353 AMS Variable Geometry Turbo control over duty cycle
354 AMS Variable Geometry Turbo control under duty cycle
355 AMS Variable Geometry Turbo overspeed
361 AMS VGT control input (MAP/EBP) above/below desired level
365 AMS EGR Valve Position above/below desired level
368 AMS EGR driver module/ECM2 communication fault
371 EFP Engine Fuel Pressure is above normal operating range
372 EFP Engine Fuel Pressure is below normal operating range
421 – 426 INJ High side to low side open (cylinder number indicated)
431 – 436 INJ High side shorted to low side (cylinder number indicated)
451 – 456 INJ High side short to ground or V BAT (cylinder number indicated)
523 IDM IDM V IGN voltage low
525 IDM IDM fault
533 IDM IDM relay voltage high
534 IDM IDM relay voltage low
543 ECM/IDM ECM/IDM communications fault
546 ECM/IDM Engine Brake Control Pressure is below expected range
547 ECM/IDM Engine Brake Control Pressure is above expected range
551 ECM/IDM IDM/CMPO signal inactive
552 ECM/IDM IDM incorrect CMPO signal signature
553 ECM/IDM IDM CKPO signal inactive
554 ECM/IDM IDM incorrect CKPO signal signature
613 ECM ECM/IDM software not compatible
614 ECM EFRC/ECM configuration mismatch
621 ECM Engine using mfg. default rating
622 ECM Engine using field default rating
623 ECM Invalid Engine Family Rating Code (EFRC)
624 ECM Field default active
626 ECM/PWR Unexpected reset fault
631 ECM Read Only Memory (ROM) self test fault
632 ECM Random Access Memory (RAM) – CPU self test fault
655 ECM Programmable parameter list level incompatible
661 ECM RAM programmable parameter list corrupt
664 ECM Calibration level incompatible
665 ECM Programmable parameter memory content corrupt

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