Tech Tips
Parameters listed in the chart may be different than your readings depending on the type of instrument and other factors. If any DTCs are displayed 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 |
|---|---|---|---|---|---|
| P0046 | Turbocharger / Supercharger Boost Control Solenoid Circuit Range / Performance | - Turbocharger sub-assembly - Turbo motor driver |
Comes on | DTC stored | |
| P0047 | Turbocharger/Supercharger Boost Control "A" Circuit Low | - Open in DC motor circuit - Turbo motor driver - Turbocharger sub-assembly (DC Motor) |
Comes on | DTC stored | |
| P0048 | Turbocharger/Supercharger Boost Control "A" Circuit High | - Short in DC motor circuit - Turbo motor driver - Turbocharger sub-assembly (DC motor) |
Comes on | DTC stored | |
| P00AF | Turbocharger/Supercharger Boost Control "A" Module Performance | - Turbo motor driver - Open or short in turbo motor driver circuit - Turbo motor driver ground problem - ECM |
Comes on | DTC stored | |
| P0069 | MAP Sensor Too High or Too Low | ECM | Comes on | DTC stored | |
| P0087 | Fuel Rail / System Pressure - Too Low | - Open or short in fuel pressure sensor circuit - Fuel pressure sensor - ECM |
Comes on | DTC stored | |
| P0088 | Fuel Rail / System Pressure - Too High | - Suction control valve - Pressure discharge valve - Short in suction control valve circuit - Opening in fuel pressure sensor circuit - Fuel pressure sensor - ECM |
Comes on | DTC stored | |
| P0093 | Fuel System Leak Detected - Large Leak | - Fuel line between supply pump assembly and common rail assembly - Fuel line between common rail assembly and each fuel injector assembly - Suction control valve - Common rail assembly - Fuel injector assembly - Fuel filter - Fuel pressure sensor - Crankshaft position sensor - Open or short in EDU circuit (P0200 set simultaneously) - Open or short in injector circuit - EDU (P0200 set simultaneously) - ECM |
Comes on | DTC stored | |
| P0101 | Mass or Volume Air Flow Circuit Range / Performance Problem | Mass air flow meter | 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 - EFI3 fuse - 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 | |
| P0106 | Manifold Absolute Pressure / Barometric Pressure Circuit Range / Performance Problem | Manifold absolute pressure sensor | Comes on | DTC stored | |
| P0107 | Manifold Absolute Pressure / Barometric Pressure Circuit Low Input | - Open or short in manifold absolute pressure sensor circuit - Manifold absolute pressure sensor - Turbocharger sub-assembly - Electric EGR control valve assembly - ECM |
Comes on | DTC stored | |
| P0108 | Manifold Absolute Pressure / Barometric Pressure Circuit High Input | - Open or short in manifold absolute pressure sensor circuit - Manifold absolute pressure sensor - Turbocharger sub-assembly - Electric EGR control valve assembly - ECM |
Comes on | DTC stored | |
| P0112 | Intake Air Temperature Circuit Low Input | - Short in intake air temperature sensor 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 intake mass air flow meter) - ECM |
Comes on | DTC stored | |
| P0115 | Engine Coolant Temperature Circuit | - Open or short in engine coolant temperature sensor circuit - Engine coolant temperature sensor - ECM |
Comes on | DTC stored | |
| P0116 | Engine Coolant Temperature Circuit Range / Performance Problem | Engine coolant temperature sensor | 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 | ||
| P0168 | Fuel Temperature Too High | Fuel temperature sensor | Comes on | DTC stored | |
| P0180 | Fuel Temperature Sensor "A" Circuit | - Open or short in fuel temperature sensor circuit - Fuel temperature sensor - ECM |
Comes on | DTC stored | |
| P0182 | Fuel Temperature Sensor "A" Circuit Low Input | - Short in fuel temperature sensor circuit - Fuel temperature sensor - ECM |
Comes on | DTC stored | |
| P0183 | Fuel Temperature Sensor "A" Circuit High Input | - Open in fuel temperature sensor circuit - Fuel temperature sensor - ECM |
Comes on | DTC stored | |
| P0190 | Fuel Rail Pressure Sensor Circuit | - Open or short in fuel pressure sensor circuit - Fuel pressure sensor - ECM |
Comes on | DTC stored | |
| P0191 | Fuel Rail Pressure Sensor Circuit Range / Performance | Fuel pressure sensor | 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 | |
| P0200 | Injector Circuit / Open | - Open or short in EDU circuit - Fuel injector assembly - EDU - ECM |
Comes on | DTC stored | |
| P0299 | Turbocharger / Supercharger Underboost | - Turbocharger sub-assembly - Extremely low battery voltage (P0560 output simultaneously) - Disconnected pipe between turbo and intake manifold - Disconnected manifold absolute pressure sensor hose - Throttle valve stuck closed - Electric EGR control valve assembly does not close - Exhaust system or intake system modified (leading to increased pressure loss, etc.) - Manifold absolute pressure sensor - Injection system (reduction in fuel injection volume) - ECM |
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 |
- | DTC stored | |
| P0340 | Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor) | - Open or short in camshaft position sensor circuit - Camshaft position sensor - Pump drive shaft pulley - ECM |
Comes on | DTC stored | |
| P0400 | Exhaust Gas Recirculation Flow | - Electric EGR control valve assembly stuck - Electric EGR control valve assembly does not move smoothly - E-VRV for EGR (EGR control valve assembly) - VSV for EGR cut - E-VRV for EGR circuit - VSV for EGR cut circuit - EGR blockage in line between exhaust manifold and intake manifold - EFI3 fuse - Mass air flow meter - Intake system (leaks or blockages) - EGR cooler - Exhaust system (Exhaust gas leaks) - ECM |
Comes on | DTC stored | |
| P0405 | Exhaust Gas Recirculation Sensor "A" Circuit Low | - Open or short in EGR valve position sensor circuit - EGR valve position sensor - ECM |
Comes on | DTC stored | |
| P0406 | Exhaust Gas Recirculation Sensor "A" Circuit High | - Open or short in EGR valve position sensor circuit - EGR valve position sensor - 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 throttle valve circuit - Open or short in throttle valve position sensor circuit - Throttle position sensor (built in diesel throttle body assembly) - EFI3 fuse - ECM |
Comes on | DTC stored | |
| P0489 | Exhaust Gas Recirculation Control Circuit Low | - E-VRV for EGR - Open or short in E-VRV for EGR circuit - ECM |
Comes on | DTC stored | |
| P0490 | Exhaust Gas Recirculation Control Circuit High | - E-VRV for EGR - Open or short in E-VRV for EGR circuit - ECM |
Comes on | DTC stored | |
| P0500 | Vehicle Speed Sensor "A" | - Open or short in speed sensor circuit - Vehicle speed sensor - Combination meter assembly - ECM |
Comes on | DTC stored | |
| P0504 | Brake Switch "A" / "B" Correlation | - Short in stop light switch signal circuit - Stop light switch assembly - ECM |
- | DTC stored | |
| P0516 | Battery Temperature Sensor Circuit Low | - Battery thermometer sensor - Short in battery thermometer sensor circuit - ECM |
- | DTC stored | |
| P0517 | Battery Temperature Sensor Circuit High | - Battery thermometer sensor - Open in battery thermometer sensor circuit - ECM |
- | DTC stored | |
| P0560 | System Voltage | - Open in back-up power source circuit - Low battery voltage - ECM |
Comes on | DTC stored | |
| P0606 | ECM / PCM Processor | 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 | |
| P0617 | Starter Relay Circuit High | - Starter relay circuit - Ignition switch lock cylinder assembly - ECM |
Comes on | DTC stored | |
| P0627 | Fuel Pump Control Circuit / Open | - Open or short in suction control valve circuit - Suction control valve - ECM |
Comes on | DTC stored | |
| P0724 | Brake Switch "B" Circuit High | - Short in stop light switch signal circuit - Stop light switch assembly - ECM |
Comes on | DTC stored | |
| P1229 | Fuel Pump System | - Short in suction control valve circuit - Suction control valve - ECM |
Comes on | DTC stored | |
| P1238 | Injector Malfunction | - Valve timing - Fuel with low cetane number used - ECM |
Comes on | DTC stored | |
| P1251 | Turbocharger / Supercharger Overboost Condition (Too High) | - Turbocharger sub-assembly - VN turbo link stuck malfunction - Extremely low battery voltage (P0560 stored simultaneously) - Intake system - Exhaust system - Electric EGR control valve assembly - EGR cooler - Injector assembly - Diesel throttle body assembly - ECM |
Comes on | DTC stored | |
| P1271 | Fuel Regulator Circuit Malfunction (EDU Drive) | - Open or short in pressure discharge valve circuit - Open or short in pressure discharge valve itself - EDU - ECM |
Comes on | DTC stored | |
| P1272 | Fuel Pressure Regulator Malfunction | - Open or short in pressure discharge valve circuit (P1271 is set simultaneously) - Pressure discharge valve - Suction control valve - ECM |
Comes on | DTC stored | |
| P1496 | Intake Air Temperature Sensor 1 Circuit Low | - Open or short in diesel turbo inlet air temperature sensor circuit - Diesel turbo inlet air temperature sensor - ECM |
Comes on | DTC stored | |
| P1497 | Intake Air Temperature Sensor 1 Circuit High | - Open or short in diesel turbo inlet air temperature sensor circuit - Diesel turbo inlet air temperature sensor - ECM |
Comes on | DTC stored | |
| P1601 | Injector Correction Circuit Malfunction (EEPROM) | - Fuel injector compensation code - Fuel injector pilot quantity learning value - ECM |
- | DTC stored | |
| P1604 | Startability Malfunction | - Battery - Irregular fuel - Lack of fuel - Suction control valve - Fuel injector assembly - Fuel filter assembly - Glow system - Injector driver (EDU) - Mass air flow meter - Intake system - Exhaust system - Engine damaged, seized up - Loss of compression - Pressure discharge valve - Fuel pressure sensor - EGR system - Diesel throttle system |
- | DTC stored | |
| P1607 | Cruise Control Input Processor | ECM | Comes on | DTC stored | |
| P2006 | Intake Manifold Runner Control Stuck Closed (Bank 1) | - VSV for swirl control valve - Open or short in VSV for swirl control valve circuit - Intake manifold (swirl control valve) - Electric EGR control valve assembly - MAF meter - Air cleaner - Air cleaner hose - Vacuum hose - ECM |
Comes on | DTC stored | |
| P2009 | Intake Manifold Runner Control Circuit Low (Bank 1) | - VSV for swirl control valve - Open in VSV for swirl control valve circuit - EFI3 fuse - ECM |
Comes on | DTC stored | |
| P2010 | Intake Manifold Runner Control Circuit High (Bank 1) | - VSV for swirl control valve - Short in VSV for swirl control valve circuit - ECM |
Comes on | DTC stored | |
| P2120 | Throttle / Pedal Position Sensor / Switch "D" Circuit | - Accelerator pedal position sensor - Accelerator pedal - Accelerator pedal rod (arm) deformed - ECM |
Comes on | DTC stored | |
| P2121 | Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance | - Accelerator pedal position sensor circuit - Accelerator pedal position sensor - ECM |
Comes on | DTC stored | |
| P2122 | Throttle / Pedal Position Sensor / Switch "D" Circuit Low Input | - Accelerator pedal position sensor - Open in VCPA circuit - VPA circuit open or ground short - Accelerator pedal - Accelerator pedal rod (arm) deformed - ECM |
Comes on | DTC stored | |
| P2123 | Throttle / Pedal Position Sensor / Switch "D" Circuit High Input | - Accelerator pedal position sensor - Open in EPA circuit - Accelerator pedal - Accelerator pedal rod (arm) deformed - ECM |
Comes on | DTC stored | |
| P2125 | Throttle / Pedal Position Sensor / Switch "E" Circuit | - Accelerator pedal position sensor - Accelerator pedal - Accelerator pedal rod (arm) deformed - ECM |
Comes on | DTC stored | |
| P2127 | Throttle / Pedal Position Sensor / Switch "E" Circuit Low Input | - Accelerator pedal position sensor - Open in VCP2 circuit - VPA2 circuit open or ground short - Accelerator pedal - Accelerator pedal rod (arm) deformed - ECM |
Comes on | DTC stored | |
| P2128 | Throttle / Pedal Position Sensor / Switch "E" Circuit High Input | - Accelerator pedal position sensor - Open in EPA2 circuit - Accelerator pedal - Accelerator pedal rod (arm) deformed - ECM |
Comes on | DTC stored | |
| P2138 | Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation | - VPA1 and VPA2 circuits are shortcircuited - Accelerator pedal position sensor - Accelerator pedal - Accelerator pedal rod (arm) deformed - ECM |
Comes on | DTC stored | |
| P2226 | Barometric Pressure Circuit | ECM | 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 | |
| P245C | EGR Cooler Bypass Control Circuit Low | - Open in EGR cooler VSV circuit - EGR cooler VSV - EFI3 fuse - ECM |
Comes on | DTC stored | |
| P245D | EGR Cooler Bypass Control Circuit High | - Short in EGR cooler VSV circuit - EGR cooler VSV - ECM |
Comes on | DTC stored | |
| P2563 | Turbocharger/Supercharger Boost Control Position Sensor "A" Circuit Range/Performance | Nozzle vane position sensor (Turbocharger sub-assembly) |
Comes on | DTC stored | |
| P2564 | Turbocharger/Supercharger Boost Control Position Sensor "A" Circuit Low | - Nozzle vane position sensor (Turbocharger sub-assembly) - Open or short in nozzle vane position sensor circuit - Turbo motor driver |
Comes on | DTC stored | |
| P2565 | Turbocharger/Supercharger Boost Control Position Sensor "A" Circuit High | - Nozzle vane position sensor (Turbocharger sub-assembly) - Open or short in nozzle vane position sensor circuit - Turbo motor driver |
Comes on | DTC stored | |
| P2588 | Turbocharger/Supercharger Boost Control Position Sensor "B" Circuit Low | - Nozzle vane position sensor (Turbocharger sub-assembly) - Open or short in nozzle vane position sensor circuit - Turbo motor driver |
Comes on | DTC stored | |
| P2589 | Turbocharger/Supercharger Boost Control Position Sensor "B" Circuit High | - Nozzle vane position sensor (Turbocharger sub-assembly) - Open or short in nozzle vane position sensor circuit - Turbo motor driver |
Comes on | DTC stored |