Navistar Diagnostic Trouble Code Index

 

 Navistar  Diagnostic Trouble Code Index

DTC Codes

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