HINT:
Parameters listed in the chart may be different from your readings depending on the type of instruments and other factors.
If any Diagnostic trouble codes are displayed during a check mode, check the circuit for the Diagnostic trouble codes listed in the chart below. For details of each Diagnostic trouble code, refer to the page indicated.
| DTC No. | Detection Item | Trouble Area | MIL | Memory |
| P0031 | Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1) | - Open in A/F sensor heater circuit - A/F sensor heater - A/F sensor heater relay - ECM |
Comes on | DTC Stored |
| P0032 | Oxygen (A/F) Sensor Heater Control Circuit High (Bank 1 Sensor 1) | - Open in A/F sensor heater circuit - A/F sensor heater - A/F sensor heater relay - ECM |
Comes on | DTC Stored |
| P0045 | Turbocharger / Supercharger Boost Control Solenoid Circuit / Open | - VRV - Open or short in VRV circuit - 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 | - Supply pump (suction control valve) - Common rail assembly (pressure discharge valve) - Short in supply pump (suction control valve) circuit - ECM |
Comes on | DTC Stored |
| P0093 | Fuel System Leak Detected - Large Leak | - Fuel line between supply pump and common rail - Fuel line between common rail and each injector - Supply pump - Common rail - Injectors - Pressure limiter - Open or short in EDU circuit (P0200 set simultaneously) - Open or short in injector circuit - EDU (P0200 set simultaneously) - ECM |
Comes on | DTC Stored |
| P0095 | Intake Air Temperature Sensor 2 Circuit | - Open or short in diesel turbo IAT sensor circuit - Diesel turbo IAT sensor - ECM |
Comes on | DTC Stored |
| P0097 | Intake Air Temperature Sensor 2 Circuit Low | - Open or short in diesel turbo IAT sensor circuit - Diesel turbo IAT sensor - ECM |
Comes on | DTC Stored |
| P0098 | Intake Air Temperature Sensor 2 Circuit High | - Open or short in diesel turbo IAT sensor circuit - Diesel turbo IAT sensor - ECM |
Comes on | DTC Stored |
| P0100 | Mass or Volume Air Flow Circuit | - Open or short in mass air flow meter circuit - Mass air flow meter - ECM |
Comes on | DTC Stored |
| P0101 | Mass or Volume Air Flow Circuit Range / Performance Problem | Mass air flow meter | Comes on | DTC Stored |
| P0102 | Air Flow Meter Circuit Low Input | - Open or short in mass air flow meter circuit - Mass air flow meter - ECM |
Comes on | DTC Stored |
| P0103 | Air Flow Meter Circuit High Input | - Open or short in mass air flow meter circuit - Mass air flow meter - ECM |
Comes on | DTC Stored |
| P0105 | Manifold Absolute Pressure / Barometric Pressure Circuit | - Open or short in manifold absolute pressure sensor circuit - Manifold absolute pressure sensor - Turbocharger assembly - EGR valve assembly - 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 assembly - EGR 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 assembly - EGR valve assembly - ECM |
Comes on | DTC Stored |
| P0110 | Intake Air Temperature Circuit | - Open or short in IAT sensor circuit - IAT sensor (built into mass air flow meter) - ECM |
Comes on | DTC Stored |
| P0112 | Intake Air Temperature Circuit Low Input | - Open or short in IAT sensor circuit - IAT sensor (built into mass air flow meter) - ECM |
Comes on | DTC Stored |
| P0113 | Intake Air Temperature Circuit High Input | - Open or short in IAT sensor circuit - IAT sensor (built into mass air flow meter) - ECM |
Comes on | DTC Stored |
| P0115 | Engine Coolant Temperature Circuit | - Open or short in ECT sensor circuit - ECT 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 | - Open or short in ECT sensor circuit - ECT sensor - ECM |
Comes on | DTC Stored |
| P0118 | Engine Coolant Temperature Circuit High Input | - Open or short in ECT sensor circuit - ECT sensor - ECM |
Comes on | DTC Stored |
| P0120 | Throttle / Pedal Position Sensor / Switch "A" Circuit | - Open or short in throttle valve position sensor circuit - Throttle position 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 |
| 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 | - 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 |
| 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 - Injector - EDU - ECM |
Comes on | DTC Stored |
| P0234 | Turbocharger / Supercharger Overboost Condition | - VRV for turbocharger - Open or short in VRV circuit - Turbocharger - Vacuum hose - EGR valve - ECM |
Comes on | DTC Stored |
| P0299 | Turbocharger / Supercharger Underboost | - VRV for turbocharger - Open or short in VRV circuit - Turbocharger - Vacuum hose - EGR valve - 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 No. 1 plate - 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 No. 1 plate - 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 | - EGR valve stuck - EGR valve does not move smoothly - Open or short in E-VRV for EGR circuit - Open or short in EGR valve position sensor circuit - EGR valve position sensor - Vacuum pump - Vacuum hose connection loose - 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) - ECM |
Comes on | DTC Stored |
| P0500 | Vehicle Speed Sensor "A" | - Open or short in speed sensor circuit - Speed sensor - Combination meter - ECM |
Comes on | DTC Stored |
| P0504 | Brake Switch "A" / "B" Correlation | - Short in stop light switch signal circuit - Stop light switch - ECM |
- | DTC Stored |
| P0516 | Battery Temperature Sensor Circuit Low | - Battery current sensor - Short in battery current sensor circuit - ECM |
- | DTC Stored |
| P0517 | Battery Temperature Sensor Circuit High | - Battery current sensor - Open in battery current sensor circuit - ECM |
- | DTC Stored |
| P0544 | Exhaust GAS Temperature Sensor Circuit (Bank 1 Sensor 1) | - Open or short in exhaust gas temperature sensor (upstream) circuit - Exhaust gas temperature sensor (upstream) - ECM |
Comes on | DTC Stored |
| P0545 | Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 1) | - Open or short in exhaust gas temperature sensor (upstream) circuit - Exhaust gas temperature sensor (upstream) - ECM |
Comes on | DTC Stored |
| P0546 | Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 1) | - Open or short in exhaust gas temperature sensor (upstream) circuit - Exhaust gas temperature sensor (upstream) - ECM |
Comes on | 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 |
| P0607 | Control Module Performance | ECM | Comes on | DTC Stored |
| P0617 | Starter Relay Circuit High | - Starter relay circuit - Ignition switch - 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 |
| P1229 | Fuel Pump System | - Short in supply pump (suction control valve) circuit - Supply pump (suction control valve) - ECM |
Comes on | DTC Stored |
| P1238 | Injector Malfunction | Main: - Injector - EDU (P0200 is set simultaneously) - Open or short in engine wire harness (P0200 is set simultaneously) - Connector connection (P0200 is set simultaneously) - Compression pressure - Valve clearance Related: - Valve timing - ECM |
Comes on | DTC Stored |
| P1251 | Turbocharger / Supercharger Overboost Condition (Too High) | - VRV for turbocharger - Open or short in VRV circuit - Turbocharger - Vacuum hose - EGR valve - 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 - Supply pump - ECM |
Comes on | DTC Stored |
| P1386 | Injector for Exhaust Fuel Addition | Main: - Open or short in exhaust fuel addition injector circuit - Exhaust fuel addition injector - DPNR catalytic converter (manifold converter sub-assembly) Related: - Open in exhaust temperature sensor circuit - A/F sensor - Exhaust gas temperature sensor - Supply pump assembly - Mass air flow meter - Fuel leaks in exhaust fuel addition injector - Main injector - Cylinder compression pressure - Valve clearance - Valve timing - Air intake system has blockages - Air intake system has leakage - Exhaust system has blockages - Exhaust system has leakage - EGR system has blockages - EGR system has leakage - ECM |
Comes on | DTC Stored |
| P1425 | Differential Pressure Sensor Circuit | - Open or short in differential pressure sensor circuit - Incorrect differential pressure sensor hose routing - Differential pressure sensor - ECM |
Comes on | DTC Stored |
| P1426 | Differential Pressure Sensor Installation Error | - Incorrect differential pressure sensor hose routing - Differential pressure sensor vacuum hose is clogged - Blockage in Vacuum transmitting pipe sub-assembly - Differential pressure sensor - ECM |
Comes on | DTC Stored |
| P1427 | Differential Pressure Sensor Circuit Low | - Open or short in differential pressure sensor circuit - Incorrect differential pressure sensor hose routing - Differential pressure sensor - ECM |
Comes on | DTC Stored |
| P1428 | Differential Pressure Sensor Circuit High | - Open or short in differential pressure sensor circuit - Incorrect differential pressure sensor hose routing - Differential pressure sensor - ECM |
Comes on | DTC Stored |
| P1550 | Battery Current Sensor Circuit | - Open or short in battery current sensor circuit - Battery current sensor - ECM |
- | DTC Stored |
| P1551 | Battery Current Sensor Circuit Low | - Short in battery current sensor circuit - Battery current sensor - ECM |
- | DTC Stored |
| P1552 | Battery Current Sensor Circuit High | - Open in battery current sensor circuit - Battery current sensor - ECM |
- | DTC Stored |
| P1601 | EEPROM Error - Injector Correction Value, DPNR Thermal Degradation Record | ECM | Comes on | DTC Stored |
| P1602 | Deterioration of Battery | - Battery - ECM back-up power source circuit |
- | DTC Stored |
| P1611 | IC Circuit Malfunction | ECM | Comes on | DTC Stored |
| P1625 | Idle Signal Transmitter Circuit | - Open or short in idle control circuit - ECM |
Comes on | DTC Stored |
| P2002 | Particulate Trap Efficiency Below Threshold (Bank1) | - DPNR catalytic converter (Manifold converter sub-assembly) - Differential pressure sensor - Differential pressure sensor vacuum hose is clogged - Blockage in Vacuum transmitting pipe sub-assembly - Exhaust gas temperature sensor - Exhaust gas leaks in TOYOTA D-CAT - Mass air flow meter - ECM |
Comes on | DTC Stored |
| P2031 | Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 2) | - Open or short in exhaust gas temperature sensor (downstream) circuit - Exhaust gas temperature sensor (downstream) - ECM |
Comes on | DTC Stored |
| P2032 | Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 2) | - Open or short in exhaust gas temperature sensor (downstream) circuit - Exhaust gas temperature sensor (downstream) - ECM |
Comes on | DTC Stored |
| P2033 | Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 2) | - Open or short in exhaust gas temperature sensor (downstream) circuit - Exhaust gas temperature sensor (downstream) - ECM |
Comes on | DTC Stored |
| P2047 | Reductant Injector Circuit / Open (Bank 1 Unit 1) | - Open in exhaust fuel addition injector circuit - Exhaust fuel addition injector - ECM |
Comes on | DTC Stored |
| P2048 | Short to GND in Reductant Injector Circuit (Bank 1) | - Open in exhaust fuel addition injector circuit - Exhaust fuel addition injector - ECM |
Comes on | DTC Stored |
| P2049 | Short to B+ in Reductant Injector Circuit (Bank 1) | - Open in exhaust fuel addition injector circuit - Exhaust fuel addition injector - 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 | - VPA and VPA2 circuit are short circuited - 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 |
| P2227 | Barometric Pressure Circuit Range / Performance | 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 |
| P2237 | Oxygen (A/F) Sensor Pumping Current Circuit / Open (Bank 1 Sensor 1) | ECM | Comes on | DTC Stored |
| P2238 | Oxygen (A/F) Sensor Pumping Current Circuit Low (Bank 1 Sensor 1) | - Open or short in A/F sensor circuit - A/F sensor - A/F sensor heater - A/F sensor heater relay - A/F sensor heater and relay circuit - ECM |
Comes on | DTC Stored |
| P2239 | Oxygen (A/F) Sensor Pumping Current Circuit High (Bank 1 Sensor 1) | - Open or short in A/F sensor circuit - A/F sensor - A/F sensor heater - A/F sensor heater relay - A/F sensor heater and relay circuit - ECM |
Comes on | DTC Stored |
| P2252 | Oxygen (A/F) Sensor Reference Ground Circuit Low (Bank 1 Sensor 1) | - Open or short in A/F sensor circuit - A/F sensor - A/F sensor heater - A/F sensor heater relay - A/F sensor heater and relay circuit - ECM |
Comes on | DTC Stored |
| P2253 | Oxygen (A/F) Sensor Reference Ground Circuit High (Bank 1 Sensor 1) | - Open or short in A/F sensor circuit - A/F sensor - A/F sensor heater - A/F sensor heater relay - A/F sensor heater and relay circuit - ECM |
Comes on | DTC Stored |