ECD SYSTEM > DIAGNOSTIC TROUBLE CODE CHART

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HINT:

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.

ECD System
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	Click here
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	Click here
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	Click here
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 subassembly) -ECM	Comes on	DTC stored	Click here
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	Click here
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	Click here
P007C	Charge Air Cooler Temperature Sensor Circuit Low	-Open in intake air temperature sensor circuit -Intake air temperature sensor -ECM	Comes on	DTC stored	Click here
P007D	Charge Air Cooler Temperature Sensor Circuit High	-Short in intake air temperature sensor circuit -Intake air temperature sensor -ECM	Comes on	DTC stored	Click here
P0090	Fuel Pressure Regulator 1 Control Circuit Open	-Open or short in pressure control valve circuit -Common rail assembly (pressure control valve) -ECM	Comes on	DTC stored	Click here
P0091	Fuel Pressure Regulator 1 Control Circuit Low	-Open or short in pressure control valve circuit -Common rail assembly (pressure control valve) -ECM	Comes on	DTC stored	Click here
P0092	Fuel Pressure Regulator 1 Control Circuit High	-Open or short in pressure control valve circuit -Common rail assembly (pressure control valve) -ECM	Comes on	DTC stored	Click here
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	Click here
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	Click here
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	Click here
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	Click here
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	Click here
P0116	Engine Coolant Temperature Circuit Range / Performance Problem	-Engine coolant temperature sensor -ECM	Comes on	DTC stored	Click here
P0117	Engine Coolant Temperature Circuit Low Input	-Short in engine coolant temperature sensor circuit -Engine coolant temperature sensor -ECM	Comes on	DTC stored	Click here
P0118	Engine Coolant Temperature Circuit High Input	-Open in engine coolant temperature sensor circuit -Engine coolant temperature sensor -ECM	Comes on	DTC stored	Click here
P011C	Charge Air Temperature/Intake Air Temperature Correlation (Bank 1)	-Intake air temperature sensor -Mass air flow meter (intake air temperature sensor) -ECM	Comes on	DTC stored	Click here
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	Click here
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	Click here
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	Click here
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	Click here
P0132	Oxygen Sensor Circuit High Voltage Bank1 Sensor1	-Short in air fuel ratio sensor circuit -Air fuel ratio sensor -ECM	Comes on	DTC stored	Click here
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	Click here
P0182	Fuel Temperature Sensor "A" Circuit Low Input	-Open or short in fuel temperature sensor circuit -Fuel temperature sensor -ECM	Comes on	DTC stored	Click here
P0183	Fuel Temperature Sensor "A" Circuit High Input	-Open or short in fuel temperature sensor circuit -Fuel temperature sensor -ECM	Comes on	DTC stored	Click here
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	Click here
P0192	Fuel Rail Pressure Sensor Circuit Low Input	-Open or short in fuel pressure sensor circuit -Fuel pressure sensor -ECM	Comes on	DTC stored	Click here
P0193	Fuel Rail Pressure Sensor Circuit High Input	-Open or short in fuel pressure sensor circuit -Fuel pressure sensor -ECM	Comes on	DTC stored	Click here
P0194	Fuel Rail Pressure Sensor Circuit Intermittent	-ECM	Comes on	DTC stored	Click here
P0201	Injector Circuit / Open - (Cylinder 1)	-Open or short in injector circuit -Injector assembly -ECM	Comes on	DTC stored	Click here
P0202	Injector Circuit / Open - (Cylinder 2)	-Open or short in injector circuit -Injector assembly -ECM	Comes on	DTC stored	Click here
P0203	Injector Circuit / Open - (Cylinder 3)	-Open or short in injector circuit -Injector assembly -ECM	Comes on	DTC stored	Click here
P0204	Injector Circuit / Open - (Cylinder 4)	-Open or short in injector circuit -Injector assembly -ECM	Comes on	DTC stored	Click here
P0219	Engine Overspeed Condition	-	-	DTC stored	Click here
P0234	Turbocharger / Supercharger Overboost Condition	-Open or short in DC motor (turbocharger subassembly) circuit -Turbocharger sub-assembly -EGR valve assembly -Diesel throttle body assembly -Turbo pressure sensor -Vacuum hose -ECM	Comes on	DTC stored	Click here
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	Click here
P0237	Turbocharger / Supercharger Boost Sensor "A" Circuit Low	-Short in turbo pressure sensor circuit -Turbo pressure sensor -ECM	Comes on	DTC stored	Click here
P0238	Turbocharger / Supercharger Boost Sensor "A" Circuit High	-Open in turbo pressure sensor circuit -Turbo pressure sensor -ECM	Comes on	DTC stored	Click here
P0299	Turbocharger / Supercharger Underboost	-Open or short in DC motor (turbocharger subassembly) circuit -Turbocharger sub-assembly -Turbo pressure sensor -Vacuum hose -Leaks from air intake system -ECM	Comes on	DTC stored	Click here
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	Click here
P0301	Cylinder 1 Misfire Detected	-Same as DTC P0300	Comes on	DTC stored	Click here
P0302	Cylinder 2 Misfire Detected	-Same as DTC P0300	Comes on	DTC stored	Click here
P0303	Cylinder 3 Misfire Detected	-Same as DTC P0300	Comes on	DTC stored	Click here
P0304	Cylinder 4 Misfire Detected	-Same as DTC P0300	Comes on	DTC stored	Click here
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	Click here
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	Click here
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	Click here
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	Click here
P0380	Glow Plug / Heater Circuit "A" Malfunction	-Open or short in glow plug relay circuit -Glow plug relay -ECM	Comes on	DTC stored	Click here
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	Click here
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	Click here
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	Click here
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	Click here
P0489	Exhaust Gas Recirculation Control Circuit Low	-Electric EGR valve assembly -Open in EGR valve circuit -ECM	Comes on	DTC stored	Click here
P0490	Exhaust Gas Recirculation Control Circuit High	-Electric EGR valve assembly -Short in EGR valve circuit -ECM	Comes on	DTC stored	Click here
P0503	Vehicle Speed Sensor "A" Intermittent / Erratic / High	-Open or short in speed signal circuit -Combination meter -ECM	Comes on	DTC stored	Click here
P0504	Brake Switch "A" / "B" Correlation	-Short in stop light switch signal circuit -Stop light switch -ECM	Comes on	DTC stored	Click here
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	Click here
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	Click here
P0562	System Voltage Low	-ECM	Comes on	DTC stored	Click here
P0563	System Voltage High	-Generator -Battery (If 24 V battery is installed) -ECM	Comes on	DTC stored	Click here
P0600	Serial Communication Link	-ECM	Comes on	DTC stored	Click here
P0603	Internal Control Module Keep Alive Memory (KAM) Error	-Injector compensation code -DPF Deterioration Record	Comes on	DTC stored	Click here
P0604	Random Access Memory (RAM)	-ECM	Comes on	DTC stored	Click here
P0605	Internal Control Module Read Only Memory (ROM) Error	-ECM	Comes on	DTC stored	Click here
P0606	ECM / PCM Processor	-ECM	Comes on	DTC stored	Click here
P0607	Control Module Performance	-ECM	Comes on	DTC stored	Click here
P060A	Internal Control Module Monitoring Processor Performance	-ECM	Comes on	DTC stored	Click here
P060B	Internal Control Module A/D Processing Performance	-ECM	Comes on	DTC stored	Click here
P060D	Internal Control Module Accelerator Pedal Position Performance	-ECM	Comes on	DTC stored	Click here
P0611	Fuel Injector Control Module Performance	-ECM	Comes on	DTC stored	Click here
P061A	Internal Control Module Torque Performance	-ECM	Comes on	DTC stored	Click here
P061B	Internal Control Module Torque Calculation Performance	-ECM	Comes on	DTC stored	Click here
P061C	Internal Control Module Engine RPM Performance	-ECM	Comes on	DTC stored	Click here
P062D	No. 1 Fuel Injector Driver Circuit Performance	-Short in injector circuit -Injector assembly -ECM	Comes on	DTC stored	Click here
P062F	Internal Control Module EEPROM Error	-ECM	Comes on	DTC stored	Click here
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	Click here
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	Click here
P0685	ECM / PCM Power Relay Control Circuit / Open	-Open in ECD relay circuit. -ECD relay (integration relay) -ECD MAIN fuse -ECM	-	DTC stored	Click here
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	Click here
P0704	Clutch Switch Input Circuit Malfunction	-Open or short in clutch switch circuit -Clutch switch -ECM	Comes on	DTC stored	Click here
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	Click here
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	Click here
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	Click here
P1603	Engine Stall History	-Battery -Low quality fuel -Fuel injector compensation code -Fuel filter -Cylinder compression pressure -Injector assembly -Engine coolant temperature sensor -Glow system -Supply pump assembly -Common rail assembly -ECM	-	DTC stored	Click here
P1604	Startability Malfunction	-Battery -Starting system -Low quality fuel -Fuel injector compensation code -Fuel filter -Cylinder compression pressure -Injector assembly -Engine coolant temperature sensor -Glow system -Supply pump assembly -Common rail assembly -ECM	-	DTC stored	Click here
P1633	ECM Malfunction (ETCS Circuit)	-ECM	Comes on	DTC stored	Click here
P2032	Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 2)	-Open or short in exhaust gas temperature sensor B1S2 circuit -Exhaust gas temperature sensor B1S2 -ECM	Comes on	DTC stored	Click here
P2033	Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 2)	-Open or short in exhaust gas temperature sensor B1S2 circuit -Exhaust gas temperature sensor B1S2 -ECM	Comes on	DTC stored	Click here
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	Click here
P2100	Throttle Actuator Control Motor Circuit / Open	-Open in throttle actuator circuit -Diesel throttle body assembly -ECM	Comes on	DTC stored	Click here
P2101	Throttle Actuator Control Motor Circuit Range/Performance	-Short in throttle actuator circuit -Diesel throttle body assembly -ECM	Comes on	DTC stored	Click here
P2102	Throttle Actuator Control Motor Circuit Low	-Short in throttle actuator circuit -Diesel throttle body assembly -ECM	Comes on	DTC stored	Click here
P2103	Throttle Actuator Control Motor Circuit High	-Short in throttle actuator circuit -Diesel throttle body assembly -ECM	Comes on	DTC stored	Click here
P2108	Throttle Actuator Control Module Performance	-Throttle valve does not move smoothly -ECM	-	DTC stored	Click here
P2122	Throttle / Pedal Position Sensor / Switch "D" Circuit Low Input	-Open or short in accelerator pedal position sensor circuit -Accelerator pedal position sensor -ECM	Comes on	DTC stored	Click here
P2123	Throttle / Pedal Position Sensor / Switch "D" Circuit High Input	-Open or short in accelerator pedal position sensor circuit -Accelerator pedal position sensor -ECM	Comes on	DTC stored	Click here
P2127	Throttle / Pedal Position Sensor / Switch "E" Circuit Low Input	-Open or short in accelerator pedal position sensor circuit -Accelerator pedal position sensor -ECM	Comes on	DTC stored	Click here
P2128	Throttle / Pedal Position Sensor / Switch "E" Circuit High Input	-Open or short in accelerator pedal position sensor circuit -Accelerator pedal position sensor -ECM	Comes on	DTC stored	Click here
P2138	Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation	-Accelerator pedal position sensor	Comes on	DTC stored	Click here
P2228	Barometric Pressure Circuit Low Input	-ECM	Comes on	DTC stored	Click here
P2229	Barometric Pressure Circuit High Input	-ECM	Comes on	DTC stored	Click here
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	Click here
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	Click here
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	Click here
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	Click here
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	Click here
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	Click here
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	Click here
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	Click here
P250D	Open in Engine Oil Level Sensor Circuit	-Open in engine oil level sensor circuit -Engine oil level sensor -ECM	Comes on	DTC stored	Click here
P252F	Engine Oil Level High	-Engine oil amount -Engine oil level sensor -Open or short in oil level sensor circuit	Comes on	DTC stored	Click here
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	Click here
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	Click here
U0129	Lost Communication with Skid Control ECU	-Wire harness (CANL and CANH circuits) -ECM -Skid control ECU	Comes on	DTC stored	Click here