All PACCAR Fault Codes
186 PACCAR diesel fault codes. Click any code for causes, diagnostics, severity, and common fixes.
PACCAR-P1001 critical
Engine ECM Internal Fault
PACCAR-P1002 critical
Engine ECM Memory Checksum Error
PACCAR-P1712 critical
PACCAR MX fault code P1712 — definition not reliably documented
PACCAR-P0087 serious
Fuel Rail Pressure Too Low
PACCAR-P0088 serious
Fuel Rail Pressure Too High
PACCAR-P0191 serious
Fuel Rail Pressure Sensor Circuit Range/Performance
PACCAR-P0234 serious
Turbo/Super Charger Overboost Condition
PACCAR-P0299 serious
Turbo/Super Charger Underboost
PACCAR-P0300 serious
Random Cylinder Misfire
PACCAR-P0335 serious
Crankshaft Position Sensor Circuit
PACCAR-P0340 serious
Camshaft Position Sensor Circuit
PACCAR-P0341 serious
Camshaft Position Sensor Performance
PACCAR-P0420 serious
Catalyst System Efficiency Below Threshold Bank 1
PACCAR-P0607 serious
Control Module Performance
PACCAR-P060A serious
Internal Control Module Monitoring Processor Performance
PACCAR-P1003 serious
Engine ECM Power Supply Fault
PACCAR-P1004 serious
Engine ECM Software Calibration Incompatibility
PACCAR-P1008 serious
CAN J1939 Bus Off
PACCAR-P1009 serious
ECU Ground Fault
PACCAR-P1011 serious
Fuel Rail Pressure Sensor Circuit Low
PACCAR-P1012 serious
Fuel Rail Pressure Sensor Circuit High
PACCAR-P1013 serious
Fuel Rail Pressure Control - Pressure Too Low
PACCAR-P1014 serious
Fuel Rail Pressure Control - Pressure Too High
PACCAR-P1016 serious
Fuel Pressure Relief Valve Open
PACCAR-P1022 serious
Injector Cylinder 1 Circuit
PACCAR-P1023 serious
Injector Cylinder 2 Circuit
PACCAR-P1024 serious
Injector Cylinder 3 Circuit
PACCAR-P1025 serious
Injector Cylinder 4 Circuit
PACCAR-P1026 serious
Injector Cylinder 5 Circuit
PACCAR-P1027 serious
Injector Cylinder 6 Circuit
PACCAR-P1028 serious
Injector Power Supply Circuit
PACCAR-P1029 serious
CP3 High Pressure Pump Performance
PACCAR-P1031 serious
PACCAR MX fault code P1031 — definition not reliably documented
PACCAR-P1032 serious
PACCAR MX fault code P1032 — definition not reliably documented
PACCAR-P1033 serious
PACCAR MX fault code P1033 — definition not reliably documented
PACCAR-P1034 serious
PACCAR MX fault code P1034 — definition not reliably documented
PACCAR-P1035 serious
PACCAR MX fault code P1035 — definition not reliably documented
PACCAR-P1041 serious
PACCAR MX fault code P1041 — definition not reliably documented
PACCAR-P1042 serious
PACCAR MX fault code P1042 — definition not reliably documented
PACCAR-P1043 serious
PACCAR MX fault code P1043 — definition not reliably documented
PACCAR-P1044 serious
PACCAR MX fault code P1044 — definition not reliably documented
PACCAR-P1405 serious
DOC Efficiency Low
PACCAR-P1406 serious
DOC Face-Plugging Detected
PACCAR-P1407 serious
HC Doser Injector Circuit
PACCAR-P1408 serious
HC Doser Fuel Pressure Low
PACCAR-P1409 serious
HC Doser Shutoff Valve
PACCAR-P1414 serious
PACCAR MX fault code P1414 — definition not reliably documented
PACCAR-P1415 serious
PACCAR MX fault code P1415 — definition not reliably documented
PACCAR-P1416 serious
PACCAR MX fault code P1416 — definition not reliably documented
PACCAR-P1417 serious
PACCAR MX fault code P1417 — definition not reliably documented
PACCAR-P1418 serious
PACCAR MX fault code P1418 — definition not reliably documented
PACCAR-P1420 serious
PACCAR MX fault code P1420 — definition not reliably documented
PACCAR-P1421 serious
PACCAR MX fault code P1421 — definition not reliably documented
PACCAR-P1423 serious
PACCAR MX fault code P1423 — definition not reliably documented
PACCAR-P1429 serious
Exhaust Backpressure Too High
PACCAR-P1501 serious
PACCAR MX fault code P1501 — definition not reliably documented
PACCAR-P1502 serious
PACCAR MX fault code P1502 — definition not reliably documented
PACCAR-P1506 serious
PACCAR MX fault code P1506 — definition not reliably documented
PACCAR-P1507 serious
PACCAR MX fault code P1507 — definition not reliably documented
PACCAR-P1508 serious
PACCAR MX fault code P1508 — definition not reliably documented
PACCAR-P1509 serious
PACCAR MX fault code P1509 — definition not reliably documented
PACCAR-P1511 serious
PACCAR MX fault code P1511 — definition not reliably documented
PACCAR-P1512 serious
PACCAR MX fault code P1512 — definition not reliably documented
PACCAR-P1513 serious
PACCAR MX fault code P1513 — definition not reliably documented
PACCAR-P1516 serious
PACCAR MX fault code P1516 — definition not reliably documented
PACCAR-P1517 serious
PACCAR MX fault code P1517 — definition not reliably documented
PACCAR-P1519 serious
PACCAR MX fault code P1519 — definition not reliably documented
PACCAR-P1521 serious
PACCAR MX fault code P1521 — definition not reliably documented
PACCAR-P1522 serious
PACCAR MX fault code P1522 — definition not reliably documented
PACCAR-P1523 serious
PACCAR MX fault code P1523 — definition not reliably documented
PACCAR-P1527 serious
PACCAR MX fault code P1527 — definition not reliably documented
PACCAR-P1529 serious
PACCAR MX fault code P1529 — definition not reliably documented
PACCAR-P1530 serious
PACCAR MX fault code P1530 — definition not reliably documented
PACCAR-P1531 serious
PACCAR MX fault code P1531 — definition not reliably documented
PACCAR-P1600 serious
PACCAR MX fault code P1600 — definition not reliably documented
PACCAR-P1607 serious
PACCAR MX fault code P1607 — definition not reliably documented
PACCAR-P1609 serious
PACCAR MX fault code P1609 — definition not reliably documented
PACCAR-P1612 serious
CEM Aftertreatment Control Module Internal Fault
PACCAR-P1613 serious
CEM Communication Lost
PACCAR-P1615 serious
PACCAR MX fault code P1615 — definition not reliably documented
PACCAR-P1703 serious
PACCAR MX fault code P1703 — definition not reliably documented
PACCAR-P1704 serious
PACCAR MX fault code P1704 — definition not reliably documented
PACCAR-P1705 serious
PACCAR MX fault code P1705 — definition not reliably documented
PACCAR-P1709 serious
PACCAR MX fault code P1709 — definition not reliably documented
PACCAR-P1710 serious
PACCAR MX fault code P1710 — definition not reliably documented
PACCAR-P1711 serious
PACCAR MX fault code P1711 — definition not reliably documented
PACCAR-P2047 serious
Reductant Injector Circuit/Open
PACCAR-P2048 serious
Reductant Injector Circuit Low
PACCAR-P2049 serious
Reductant Injector Circuit High
PACCAR-P204F serious
PACCAR MX fault code P204F — definition not reliably documented
PACCAR-P20E8 serious
PACCAR MX fault code P20E8 — definition not reliably documented
PACCAR-P229E serious
PACCAR MX fault code P229E — definition not reliably documented
PACCAR-P2450 serious
PACCAR MX fault code P2450 — definition not reliably documented
PACCAR-U0100 serious
Lost Communication with ECM/PCM
PACCAR-U0101 serious
Lost Communication with TCM
PACCAR-U0121 serious
Lost Communication with ABS Module
PACCAR-P0091 moderate
Fuel Pressure Regulator 1 Control Circuit Low
PACCAR-P0101 moderate
MAF Circuit Range/Performance
PACCAR-P0102 moderate
MAF Sensor Circuit Low
PACCAR-P0103 moderate
MAF Sensor Circuit High
PACCAR-P0401 moderate
Exhaust Gas Recirculation Flow Insufficient Detected
PACCAR-P0402 moderate
Exhaust Gas Recirculation Flow Excessive Detected
PACCAR-P0500 moderate
Vehicle Speed Sensor Malfunction
PACCAR-P0562 moderate
System Voltage Low
PACCAR-P0563 moderate
System Voltage High
PACCAR-P0628 moderate
Fuel Pump Circuit Low
PACCAR-P0700 moderate
Transmission Control System Malfunction
PACCAR-P1005 moderate
Engine ECM Configuration Parameter Out of Range
PACCAR-P1006 moderate
VIN Not Programmed
PACCAR-P1007 moderate
Vehicle Speed Parameter Mismatch
PACCAR-P1017 moderate
Fuel Lift Pump Circuit Low
PACCAR-P1018 moderate
Fuel Lift Pump Circuit High
PACCAR-P1019 moderate
Fuel Temperature Sensor Circuit
PACCAR-P1020 moderate
Fuel Filter Restriction
PACCAR-P1021 moderate
Water in Fuel Detected
PACCAR-P1030 moderate
Fuel Pressure Low After Engine Run
PACCAR-P1036 moderate
Charge Air Cooler Outlet Temperature High
PACCAR-P1037 moderate
Intake Manifold Pressure Sensor Circuit
PACCAR-P1038 moderate
Intake Manifold Temperature Sensor Circuit
PACCAR-P1039 moderate
MAF Sensor Circuit
PACCAR-P1040 moderate
MAF Sensor Performance
PACCAR-P1045 moderate
PACCAR MX fault code P1045 — definition not reliably documented
PACCAR-P1046 moderate
PACCAR MX fault code P1046 — definition not reliably documented
PACCAR-P1047 moderate
PACCAR MX fault code P1047 — definition not reliably documented
PACCAR-P1048 moderate
Throttle Valve Position Sensor
PACCAR-P1049 moderate
Throttle Valve Actuator Circuit
PACCAR-P1050 moderate
Crankcase Breather Filter Restriction
PACCAR-P1400 moderate
DOC Inlet Temperature Sensor Circuit Low
PACCAR-P1401 moderate
DOC Inlet Temperature Sensor Circuit High
PACCAR-P1402 moderate
DOC Inlet Temperature Out of Range
PACCAR-P1403 moderate
DOC Outlet Temperature Sensor Circuit
PACCAR-P1404 moderate
DOC Outlet Temperature Performance
PACCAR-P1410 moderate
PACCAR MX fault code P1410 — definition not reliably documented
PACCAR-P1411 moderate
PACCAR MX fault code P1411 — definition not reliably documented
PACCAR-P1412 moderate
PACCAR MX fault code P1412 — definition not reliably documented
PACCAR-P1413 moderate
PACCAR MX fault code P1413 — definition not reliably documented
PACCAR-P1419 moderate
PACCAR MX fault code P1419 — definition not reliably documented
PACCAR-P1424 moderate
Exhaust Temperature Sensor 1 Circuit
PACCAR-P1425 moderate
Exhaust Temperature Sensor 2 Circuit
PACCAR-P1426 moderate
Exhaust Temperature Sensor 3 Circuit
PACCAR-P1427 moderate
Exhaust Temperature Sensor 4 Circuit
PACCAR-P1428 moderate
Exhaust Backpressure Sensor Circuit
PACCAR-P1430 moderate
Exhaust Backpressure Valve Actuator
PACCAR-P1500 moderate
PACCAR MX fault code P1500 — definition not reliably documented
PACCAR-P1503 moderate
PACCAR MX fault code P1503 — definition not reliably documented
PACCAR-P1504 moderate
PACCAR MX fault code P1504 — definition not reliably documented
PACCAR-P1505 moderate
PACCAR MX fault code P1505 — definition not reliably documented
PACCAR-P1510 moderate
PACCAR MX fault code P1510 — definition not reliably documented
PACCAR-P1514 moderate
PACCAR MX fault code P1514 — definition not reliably documented
PACCAR-P1515 moderate
PACCAR MX fault code P1515 — definition not reliably documented
PACCAR-P1518 moderate
PACCAR MX fault code P1518 — definition not reliably documented
PACCAR-P1520 moderate
PACCAR MX fault code P1520 — definition not reliably documented
PACCAR-P1524 moderate
PACCAR MX fault code P1524 — definition not reliably documented
PACCAR-P1525 moderate
PACCAR MX fault code P1525 — definition not reliably documented
PACCAR-P1526 moderate
PACCAR MX fault code P1526 — definition not reliably documented
PACCAR-P1528 moderate
PACCAR MX fault code P1528 — definition not reliably documented
PACCAR-P1532 moderate
PACCAR MX fault code P1532 — definition not reliably documented
PACCAR-P1533 moderate
NOx Inlet Sensor Heater Circuit
PACCAR-P1534 moderate
NOx Outlet Sensor Heater Circuit
PACCAR-P1601 moderate
PACCAR MX fault code P1601 — definition not reliably documented
PACCAR-P1602 moderate
Parked Regen Requested
PACCAR-P1604 moderate
Parked Regen Aborted by System
PACCAR-P1605 moderate
PACCAR MX fault code P1605 — definition not reliably documented
PACCAR-P1606 moderate
PACCAR MX fault code P1606 — definition not reliably documented
PACCAR-P1608 moderate
PACCAR MX fault code P1608 — definition not reliably documented
PACCAR-P1610 moderate
Exhaust Throttle Valve Stuck
PACCAR-P1611 moderate
Exhaust Throttle Valve Feedback
PACCAR-P1614 moderate
PACCAR MX fault code P1614 — definition not reliably documented
PACCAR-P1700 moderate
PACCAR MX fault code P1700 — definition not reliably documented
PACCAR-P1701 moderate
PACCAR MX fault code P1701 — definition not reliably documented
PACCAR-P1702 moderate
PACCAR MX fault code P1702 — definition not reliably documented
PACCAR-P1706 moderate
PACCAR MX fault code P1706 — definition not reliably documented
PACCAR-P1707 moderate
PACCAR MX fault code P1707 — definition not reliably documented
PACCAR-P1708 moderate
PACCAR MX fault code P1708 — definition not reliably documented
PACCAR-P2201 moderate
NOx Sensor Circuit Range/Performance (Bank 1 Sensor 1)
PACCAR-P2202 moderate
NOx Sensor Circuit Low Input
PACCAR-P2203 moderate
NOx Sensor Circuit High Input
PACCAR-P2209 moderate
NOx Sensor Heater Sense Circuit High
PACCAR-P229F moderate
NOx Sensor Bank 1 Sensor 2 Circuit
PACCAR-U0401 moderate
Invalid Data Received from ECM
PACCAR-P0128 minor
Coolant Temp Below Thermostat Regulating Temperature
PACCAR-P0380 minor
Glow Plug Control Circuit
PACCAR-P0615 minor
Starter Relay Circuit
PACCAR-P1010 minor
Engine Hours Counter Fault
PACCAR-P1422 minor
PACCAR MX fault code P1422 — definition not reliably documented
PACCAR-P1603 minor
Parked Regen Aborted by Operator