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 subassembly) -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 | |
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 | |
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 | |
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 | |
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 | |
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 | |
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 subassembly) 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 subassembly) 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 | |
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 | |
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 | |
P062F | Internal Control Module EEPROM Error | -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 | |
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 | |
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 | |
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 | |
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 | |
P1633 | ECM Malfunction (ETCS Circuit) | -ECM | Comes on | DTC stored | |
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 | |
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 | |
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 | |
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 | |
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 | |
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 | |
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 | |
P2138 | Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation | -Accelerator pedal position sensor | Comes on | 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 | |
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 |