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 |