ECD SYSTEM DIAGNOSTIC TROUBLE CODE CHART
Tech Tips
Parameters listed in the chart may be different from your readings depending on the type of instrument and other factors.
If any DTCs are output during a check mode DTC check, check the circuit for the DTCs listed in the table below. For details of each DTC, refer to the page indicated.
| DTC Code | Detection Item | Trouble Area | MIL | Memory | See page |
|---|---|---|---|---|---|
| P0031 | Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1) | -Open in air fuel ratio sensor heater circuit -Air fuel ratio sensor -ECM |
Comes on | DTC stored | |
| P0032 | Oxygen (A/F) Sensor Heater Control Circuit High (Bank 1 Sensor 1) | -Short in air fuel ratio sensor heater circuit -Air fuel ratio sensor -ECM |
Comes on | DTC stored | |
| P0045 | Turbocharger / Supercharger Boost Control Solenoid Circuit / Open | -Open in DC motor (turbocharger sub-assembly) circuit -Turbocharger sub-assembly (DC motor) -ECM |
Comes on | DTC stored | |
| P0046 | Turbocharger / Supercharger Boost Control Solenoid Circuit Range / Performance | -Open or short in DC motor (turbocharger subassembly) circuit -Turbocharger sub-assembly (DC motor) -Nozzle vane position sensor (turbocharger sub-assembly) -ECM |
Comes on | DTC stored | |
| P0047 | Turbocharger/Supercharger Boost Control "A" Circuit Low | -Short in DC motor (turbocharger sub-assembly) circuit -Turbocharger sub-assembly (DC motor) -ECM |
Comes on | DTC stored | |
| P0048 | Turbocharger/Supercharger Boost Control "A" Circuit High | -Short in DC motor (turbocharger sub-assembly) circuit -Turbocharger sub-assembly (DC motor) -ECM |
Comes on | DTC stored | |
| P007C | Charge Air Cooler Temperature Sensor Circuit Low | -Open in intake air temperature sensor circuit -Intake air temperature sensor -ECM |
Comes on | DTC stored | |
| P007D | Charge Air Cooler Temperature Sensor Circuit High | -Short in intake air temperature sensor circuit -Intake air temperature sensor -ECM |
Comes on | DTC stored | |
| P0087 | Fuel Rail / System Pressure - Too Low | -Supply pump assembly (suction control valve) -Open or short in pressure control valve circuit -Common rail assembly (pressure control valve) -Fuel filter element clogged -Fuel leak -Injector assembly -Lack of fuel -Fuel line (air bleeding) -ECM |
Comes on | DTC stored | |
| P0088 | Fuel Rail / System Pressure - Too High | -Supply pump assembly (suction control valve) -Open or short in supply pump (suction control valve) circuit -Open or short in pressure control valve circuit -Common rail assembly (pressure control valve) -Fuel filter element clogged -Fuel leak -Injector assembly -Lack of fuel -Fuel line (air bleeding) -ECM |
Comes on | DTC stored | |
| P0101 | Mass or Volume Air Flow Circuit Range / Performance Problem | -Open or short in mass air flow meter circuit -Intake mass air flow meter -Contamination in intake mass air flow meter -Turbo pressure sensor -EGR valve assembly -Open or short in EGR circuit -EGR passage -Open or short in diesel throttle motor circuit -Diesel throttle body assembly -Vacuum hose -ECM |
Comes on | DTC stored | |
| P0102 | Mass or Volume Air Flow Circuit Low Input | -Open or short in Mass Air Flow (MAF) meter circuit -Mass air flow meter -ECM |
Comes on | DTC stored | |
| P0103 | Mass or Volume Air Flow Circuit High Input | -Open or short in Mass Air Flow (MAF) meter circuit -Mass air flow meter -ECM |
Comes on | DTC stored | |
| P0112 | Intake Air Temperature Circuit Low Input | -Short in intake air temperature sensor circuit -Intake air temperature sensor (built into mass air flow meter) -ECM |
Comes on | DTC stored | |
| P0113 | Intake Air Temperature Circuit High Input | -Open in intake air temperature sensor circuit -Intake air temperature sensor (built into mass air flow meter) -ECM |
Comes on | DTC stored | |
| P0116 | Engine Coolant Temperature Circuit Range / Performance Problem | -Engine coolant temperature sensor -ECM |
Comes on | DTC stored | |
| P0117 | Engine Coolant Temperature Circuit Low Input | -Short in engine coolant temperature sensor circuit -Engine coolant temperature sensor -ECM |
Comes on | DTC stored | |
| P0118 | Engine Coolant Temperature Circuit High Input | -Open in engine coolant temperature sensor circuit -Engine coolant temperature sensor -ECM |
Comes on | DTC stored | |
| P0122 | Throttle / Pedal Position Sensor / Switch "A" Circuit Low Input | -Throttle position sensor -Open or short in VLU circuit -Open in VC circuit -ECM |
Comes on | DTC stored | |
| P0123 | Throttle / Pedal Position Sensor / Switch "A" Circuit High Input | -Throttle position sensor -Open in E2 circuit -VC and VLU circuits are short-circuited -ECM |
Comes on | DTC stored | |
| P0130 | Heated Oxygen (A/F) Sensor Circuit Malfunction (Bank 1 Sensor 1) | -Open or short in air fuel ratio sensor circuit -Air fuel ratio sensor -Open or short in air fuel ratio sensor heater circuit -ECM |
Comes on | DTC stored | |
| P0131 | Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 1) | -Short in air fuel ratio sensor circuit -Air fuel ratio sensor -ECM |
Comes on | DTC stored | |
| P0132 | Oxygen Sensor Circuit High Voltage Bank1 Sensor1 | -Short in air fuel ratio sensor circuit -Air fuel ratio sensor -ECM |
Comes on | DTC stored | |
| P0134 | Heated Oxygen (A/F) Sensor Circuit No Activity Detected (Bank 1 Sensor 1) | -Open in air fuel ratio sensor circuit -Air fuel ratio sensor -ECM |
Comes on | DTC stored | |
| P0182 | Fuel Temperature Sensor "A" Circuit Low Input | -Open or short in fuel temperature sensor circuit -Fuel temperature sensor -ECM |
Comes on | DTC stored | |
| P0183 | Fuel Temperature Sensor "A" Circuit High Input | -Open or short in fuel temperature sensor circuit -Fuel temperature sensor -ECM |
Comes on | DTC stored | |
| P0191 | Fuel Rail Pressure Sensor Circuit Range / Performance | -Supply pump assembly (suction control valve) -Open or short in supply pump (suction control valve) circuit -Open or short in pressure control valve circuit -Common rail assembly (pressure control valve) -Fuel filter element clogged -Fuel leak -Injector assembly -Lack of fuel -Fuel line (air bleeding) -High pressure fuel line -ECM |
Comes on | DTC stored | |
| P0192 | Fuel Rail Pressure Sensor Circuit Low Input | -Open or short in fuel pressure sensor circuit -Fuel pressure sensor -ECM |
Comes on | DTC stored | |
| P0193 | Fuel Rail Pressure Sensor Circuit High Input | -Open or short in fuel pressure sensor circuit -Fuel pressure sensor -ECM |
Comes on | DTC stored | |
| P0194 | Fuel Rail Pressure Sensor Circuit Intermittent | -ECM | Comes on | DTC stored | |
| P0201 | Injector Circuit / Open - (Cylinder 1) | -Open or short in injector circuit -Injector assembly -ECM |
Comes on | DTC stored | |
| P0202 | Injector Circuit / Open - (Cylinder 2) | -Open or short in injector circuit -Injector assembly -ECM |
Comes on | DTC stored | |
| P0203 | Injector Circuit / Open - (Cylinder 3) | -Open or short in injector circuit -Injector assembly -ECM |
Comes on | DTC stored | |
| P0204 | Injector Circuit / Open - (Cylinder 4) | -Open or short in injector circuit -Injector assembly -ECM |
Comes on | DTC stored | |
| P0219 | Engine Overspeed Condition | - | - | DTC stored | |
| P0234 | Turbocharger / Supercharger Overboost Condition | -Open or short in DC motor (turbocharger sub-assembly) circuit -Turbocharger sub-assembly -EGR valve assembly -Diesel throttle body assembly -Turbo pressure sensor -Vacuum hose -ECM |
Comes on | DTC stored | |
| P0236 | Turbocharger / Supercharger Boost Sensor "A" Circuit Range / Performance | -Open or short in turbo pressure sensor circuit -Turbo pressure sensor -ECM |
Comes on | DTC stored | |
| P0237 | Turbocharger / Supercharger Boost Sensor "A" Circuit Low | -Short in turbo pressure sensor circuit -Turbo pressure sensor -ECM |
Comes on | DTC stored | |
| P0238 | Turbocharger / Supercharger Boost Sensor "A" Circuit High | -Open in turbo pressure sensor circuit -Turbo pressure sensor -ECM |
Comes on | DTC stored | |
| P0299 | Turbocharger / Supercharger Underboost | -Open or short in DC motor (turbocharger sub-assembly) circuit -Turbocharger sub-assembly -Turbo pressure sensor -Vacuum hose -Leaks from air intake system -ECM |
Comes on | DTC stored | |
| P0300 | Random / Multiple Cylinder Misfire Detected | -Injector assembly -Open or short in engine wire harness -Connector connection -Compression pressure -Valve clearance -Valve timing -ECM -Low quality fuel -Injector compensation code |
- | DTC stored | |
| P0301 | Cylinder 1 Misfire Detected | -Same as DTC P0300 | Comes on | DTC stored | |
| P0302 | Cylinder 2 Misfire Detected | -Same as DTC P0300 | Comes on | DTC stored | |
| P0303 | Cylinder 3 Misfire Detected | -Same as DTC P0300 | Comes on | DTC stored | |
| P0304 | Cylinder 4 Misfire Detected | -Same as DTC P0300 | Comes on | DTC stored | |
| P0335 | Crankshaft Position Sensor "A" Circuit | -Open or short in crankshaft position sensor circuit -Crankshaft position sensor -Crankshaft position sensor plate No. 1 -ECM |
Comes on | DTC stored | |
| P0339 | Crankshaft Position Sensor "A" Circuit Intermittent | -Open or short in crankshaft position sensor circuit -Crankshaft position sensor -Crankshaft position sensor plate No. 1 -ECM |
Comes on | DTC stored | |
| P0340 | Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor) | -Open or short in camshaft position sensor circuit -Camshaft position sensor -Camshaft assembly -ECM |
Comes on | DTC stored | |
| P0344 | Camshaft Position Sensor "A" Circuit Intermittent (Bank 1 or Single Sensor) | -Open or short in camshaft position sensor circuit -Camshaft position sensor -Camshaft assembly -Valve timing -ECM |
Comes on | DTC stored | |
| P0380 | Glow Plug / Heater Circuit "A" Malfunction | -Open or short in glow plug relay circuit -Glow plug relay -ECM |
Comes on | DTC stored | |
| P0400 | Exhaust Gas Recirculation Flow | -EGR valve stuck -EGR valve does not move smoothly -Open or short in EGR valve circuit -EGR valve deposit -EGR valve passage deposit -Mass air flow meter -Turbo pressure sensor -Air intake system (leaks or blockages) -Exhaust gas leaks -ECM |
Comes on | DTC stored | |
| P0405 | Exhaust Gas Recirculation Sensor "A" Circuit Low | -Electric EGR valve assembly -Open or short in EGR valve position sensor circuit -ECM |
Comes on | DTC stored | |
| P0406 | Exhaust Gas Recirculation Sensor "A" Circuit High | -Electric EGR valve assembly -Open or short in EGR valve position sensor circuit -ECM |
Comes on | DTC stored | |
| P0488 | Exhaust Gas Recirculation Throttle Position Control Range / Performance | -Throttle valve stuck -Throttle valve does not move smoothly -Open or short in diesel throttle circuit -ECM |
Comes on | DTC stored | |
| P0489 | Exhaust Gas Recirculation Control Circuit Low | -Electric EGR valve assembly -Open in EGR valve circuit -ECM |
Comes on | DTC stored | |
| P0490 | Exhaust Gas Recirculation Control Circuit High | -Electric EGR valve assembly -Short in EGR valve circuit -ECM |
Comes on | DTC stored | |
| P0502 | Vehicle Speed Sensor "A" Circuit Low | -Open or short in speed signal circuit -Combination meter -ECM |
Comes on | DTC stored | |
| P0503 | Vehicle Speed Sensor "A" Intermittent / Erratic / High | -Open or short in speed signal circuit -Combination meter -ECM |
Comes on | DTC stored | |
| P0504 | Brake Switch "A" / "B" Correlation | -Short in stop light switch signal circuit -Stop light switch -ECM |
Comes on | DTC stored | |
| P0545 * |
Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 1) | -Open or short in exhaust gas temperature sensor B1S1 circuit -Exhaust gas temperature sensor B1S1 -ECM |
Comes on | DTC stored | |
| P0546 * |
Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 1) | -Open or short in exhaust gas temperature sensor B1S1 circuit -Exhaust gas temperature sensor B1S1 -ECM |
Comes on | DTC stored | |
| P0548 * |
Exhaust Gas Temperature Sensor Circuit Low (Bank 2 Sensor 1) | -Open or short in exhaust gas temperature sensor B1S2 circuit -Exhaust gas temperature sensor B1S2 -ECM |
Comes on | DTC stored | |
| P0549 * |
Exhaust Gas Temperature Sensor Circuit High (Bank 2 Sensor 1) | -Open or short in exhaust gas temperature sensor B1S2 circuit -Exhaust gas temperature sensor B1S2 -ECM |
Comes on | DTC stored | |
| P0562 | System Voltage Low | -ECM | Comes on | DTC stored | |
| P0563 | System Voltage High | -Generator -Battery (If 24 V battery is installed) -ECM |
Comes on | DTC stored | |
| P0600 | Serial Communication Link | -ECM | Comes on | DTC stored | |
| P0603 | Internal Control Module Keep Alive Memory (KAM) Error | -Injector compensation code -DPF Deterioration Record |
Comes on | DTC stored | |
| P0604 | Random Access Memory (RAM) | -ECM | Comes on | DTC stored | |
| P0605 | Internal Control Module Read Only Memory (ROM) Error | -ECM | Comes on | DTC stored | |
| P0606 | ECM / PCM Processor | -ECM | Comes on | DTC stored | |
| P0607 | Control Module Performance | -ECM | Comes on | DTC stored | |
| P060A | Internal Control Module Monitoring Processor Performance | -ECM | Comes on | DTC stored | |
| P060B | Internal Control Module A/D Processing Performance | -ECM | Comes on | DTC stored | |
| P060D | Internal Control Module Accelerator Pedal Position Performance | -ECM | Comes on | DTC stored | |
| P0611 | Fuel Injector Control Module Performance | -ECM | Comes on | DTC stored | |
| P061A | Internal Control Module Torque Performance | -ECM | Comes on | DTC stored | |
| P061B | Internal Control Module Torque Calculation Performance | -ECM | Comes on | DTC stored | |
| P061C | Internal Control Module Engine RPM Performance | -ECM | Comes on | DTC stored | |
| P062D | No. 1 Fuel Injector Driver Circuit Performance | -Short in injector circuit -Injector assembly -ECM |
Comes on | DTC stored | |
| P0641 | Sensor Reference Voltage "A" Circuit / Open | -Accelerator pedal assembly -Open or short in accelerator pedal position sensor circuit -Turbo pressure sensor -Open or short in turbo pressure sensor circuit -Differential pressure sensor -Open or short in differential pressure sensor circuit -ECM |
Comes on | DTC stored | |
| P0651 | Sensor Reference Voltage "B" Circuit / Open | -Turbocharger sub-assembly (nozzle vane position sensor) -Open or short in nozzle vane position sensor circuit -Common rail assembly (fuel pressure sensor) -Open or short in fuel pressure sensor circuit -Electric EGR valve assembly (EGR valve position sensor) -Open or short in EGR valve position sensor circuit -ECM |
Comes on | DTC stored | |
| P0685 | ECM / PCM Power Relay Control Circuit / Open | -Open in ECD relay circuit. -ECD relay (integration relay) -ECD MAIN fuse -ECM |
- | DTC stored | |
| P0697 | Sensor Reference Voltage "C" Circuit / Open | -Diesel throttle body assembly (throttle position sensor) -Open or short in diesel throttle position sensor circuit -Accelerator pedal assembly (accelerator pedal position sensor assembly) -Open or short in accelerator pedal position sensor circuit -ECM |
Comes on | DTC stored | |
| P0704 | Clutch Switch Input Circuit Malfunction | -Open or short in clutch switch circuit -Clutch switch -ECM |
Comes on | DTC stored | |
| P1120 | Accelerator Pedal Position Sensor Circuit Malfunction | -Open or short in accelerator pedal position sensor circuit -Accelerator pedal position sensor -ECM |
Comes on | DTC stored | |
| P1121 | Accelerator Pedal Position Sensor Range / Performance Problem | -Accelerator pedal position sensor | Comes on | DTC stored | |
| P1228 | Injection Pump Fuel Metering Control "A" Range / Performance (Cam / Rotor / Injector) | -Open or short in suction control valve circuit -Supply pump assembly (suction control valve) -ECM |
Comes on | DTC stored | |
| P1229 | Fuel Pump System | -Supply pump assembly (suction control valve) -Open or short in supply pump (suction control valve) circuit -Open or short in pressure control valve circuit -Common rail assembly (pressure control valve) -Fuel filter element clogged -Fuel leak -Injector assembly -Lack of fuel -Fuel line (air bleeding) -ECM |
Comes on | DTC stored | |
| P1271 | Fuel Regulator Circuit Malfunction (EDU Drive) | -Open or short in pressure control valve circuit -Common rail assembly (pressure control valve) -ECM |
Comes on | DTC stored | |
| P1272 | Fuel Pressure Regulator System Malfunction | -Supply pump assembly (suction control valve) -Open or short in supply pump (suction control valve) circuit -Open or short in pressure control valve circuit -Common rail assembly (pressure control valve) -Fuel filter element clogged -Fuel leak -Injector assembly -Lack of fuel -Fuel line (air bleeding) -ECM |
Comes on | DTC stored | |
| P1633 | ECM Malfunction (ETCS Circuit) | -ECM | Comes on | DTC stored | |
| P2080 * |
Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 1 | -Open or short in exhaust gas temperature sensor B1S1 circuit -Exhaust gas temperature sensor B1S1 -Leak or blockage in intake or exhaust system -Blockage in EGR passage -Electric EGR valve assembly -Turbo pressure sensor -Turbocharger sub-assembly -Mass air flow meter -Injector assembly -ECM |
- | DTC stored | |
| P2084 * |
Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 2 | -Open or short in exhaust gas temperature sensor B1S2 circuit -Exhaust gas temperature sensor B1S2 -Leak or blockage in intake or exhaust system -Blockage in EGR passage -Electric EGR valve assembly -Turbo pressure sensor -Turbocharger sub-assembly -Mass air flow meter -Injector assembly -ECM |
Comes on | DTC stored | |
| P2100 | Throttle Actuator Control Motor Circuit / Open | -Open in throttle actuator circuit -Diesel throttle body assembly -ECM |
Comes on | DTC stored | |
| P2101 | Throttle Actuator Control Motor Circuit Range/Performance | -Short in throttle actuator circuit -Diesel throttle body assembly -ECM |
Comes on | DTC stored | |
| P2102 | Throttle Actuator Control Motor Circuit Low | -Short in throttle actuator circuit -Diesel throttle body assembly -ECM |
Comes on | DTC stored | |
| P2103 | Throttle Actuator Control Motor Circuit High | -Short in throttle actuator circuit -Diesel throttle body assembly -ECM |
Comes on | DTC stored | |
| P2108 | Throttle Actuator Control Module Performance | -Throttle valve does not move smoothly -ECM |
- | DTC stored | |
| P2228 | Barometric Pressure Circuit Low Input | -ECM | Comes on | DTC stored | |
| P2229 | Barometric Pressure Circuit High Input | -ECM | Comes on | DTC stored | |
| P244A * |
Diesel Particulate Filter Differential Pressure Too Low | -Incorrect vacuum transmitting hose routing -Vacuum transmitting hose is clogged -Blockage in transmitting pipe -Differential pressure sensor -Exhaust tail pipe assembly (DPF catalytic converter) -Exhaust system modification |
Comes on | DTC stored | |
| P244B * |
Diesel Particulate Filter Differential Pressure Too High | -Blockage in transmitting pipe sub-assembly for differential pressure sensor -Blockage in exhaust pipe air hose -Exhaust gas leaks -Exhaust manifold converter sub-assembly (CCo catalytic converter) -Exhaust tail pipe assembly (DPF catalytic converter) -Injector assembly |
Comes on | DTC stored | |
| P2453 * |
Diesel Particulate Filter Pressure Sensor "A" Circuit Range/Performance | -Incorrect vacuum transmitting hose routing -Vacuum transmitting hose is clogged -Blockage in transmitting pipe -Differential pressure sensor -Exhaust tail pipe assembly (DPF catalytic converter) -ECM |
Comes on | DTC stored | |
| P2454 * |
Diesel Particulate Filter Pressure Sensor "A" Circuit Low | -Open or short in differential pressure sensor circuit -Incorrect exhaust pipe air hose routing -Differential pressure sensor -ECM |
Comes on | DTC stored | |
| P2455 * |
Diesel Particulate Filter Pressure Sensor "A" Circuit High | -Open or short in differential pressure sensor circuit -Incorrect exhaust pipe air hose routing -Differential pressure sensor -ECM |
Comes on | DTC stored | |
| P245A | Open in Exhaust Gas Recirculation Cooler Bypass Control Circuit | -Open or short in EGR cooler bypass valve VSV control circuit -EGR cooler bypass valve VSV -ECM |
Comes on | DTC stored | |
| P245C | EGR Cooler Bypass Control Circuit Low | -Short in EGR cooler bypass valve VSV control circuit -EGR cooler bypass valve VSV -ECM |
Comes on | DTC stored | |
| P245D | EGR Cooler Bypass Control Circuit High | -Short in EGR cooler bypass valve VSV control circuit -EGR cooler bypass valve VSV -ECM |
Comes on | DTC stored | |
| P2463 * |
Diesel Particulate Filter Restriction - Soot Accumulation | -Blockage in transmitting pipe sub-assembly for differential pressure sensor -Blockage in exhaust pipe air hose -Exhaust gas leaks -Exhaust manifold converter sub-assembly (CCo catalytic converter) -Exhaust tail pipe assembly (DPF catalytic converter) -Injector assembly |
Comes on | DTC stored | |
| P250D * |
Open in Engine Oil Level Sensor Circuit | -Open in engine oil level sensor circuit -Engine oil level sensor -ECM |
Comes on | DTC stored | |
| P252F * |
Engine Oil Level High | -Engine oil amount -Engine oil level sensor -Open or short in oil level sensor circuit |
Comes on | DTC stored | |
| P2564 | Turbocharger/Supercharger Boost Control Position Sensor "A" Circuit Low | -Open or short in nozzle vane position sensor circuit -Turbocharger sub-assembly (Nozzle vane position sensor) -ECM |
Comes on | DTC stored | |
| P2565 | Turbocharger/Supercharger Boost Control Position Sensor "A" Circuit High | -Open or short in nozzle vane position sensor circuit -Turbocharger sub-assembly (Nozzle vane position sensor) -ECM |
Comes on | DTC stored | |
| U0129 | Lost Communication with Skid Control ECU | -Wire harness (CANL and CANH circuits) -ECM -Skid control ECU |
Comes on | DTC stored |
-
*: w/ DPF System only.