ECD SYSTEM DIAGNOSTIC TROUBLE CODE CHART
Tech Tips
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Parameters listed in the chart may not be exactly the same as yours depending on the type of instrument and other factors.
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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 "See page" indicated below.
| DTC Code | Detection Item | Trouble Areas | MIL | Memory | See page |
|---|---|---|---|---|---|
| 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 relay - ECM |
Comes on | DTC stored | |
| P0032 | Oxygen (A/F) Sensor Heater Control Circuit High (Bank 1 Sensor 1) | - Short in A/F sensor heater circuit - A/F sensor heater - A/F relay - ECM |
Comes on | DTC stored | |
| P0045 | Turbocharger / Supercharger Boost Control Solenoid Circuit / Open | - E-VRV - Open or short in E-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 - Ran out of fuel - Fuel frozen - ECM |
Comes on | DTC stored | |
| P0088 | Fuel Rail / System Pressure - Too High | - Suction control valve - Common rail assembly (pressure discharge valve) - Open or short in suction control valve circuit - ECM |
Comes on | DTC stored | |
| P0093 | Fuel System Leak Detected - Large Leak | - Fuel line between fuel supply pump and common rail - Fuel line between common rail and fuel injector - Suction control valve - Common rail - Fuel injector (P1238 set simultaneously) - Open or short in EDU circuit (P062D set simultaneously) - Open or short in fuel injector circuit (P062D and/or P1238 set simultaneously) - EDU (P062D set simultaneously) - 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 (MAF) meter circuit - Mass air flow meter - Manifold absolute pressure sensor - IAT sensor - EGR valve - 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 | |
| P0106 | Manifold Absolute Pressure / Barometric Pressure Circuit Range / Performance Problem | - Open or short in manifold absolute pressure sensor circuit - Manifold absolute pressure sensor - ECM |
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 - 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 - ECM |
Comes on | DTC stored | |
| P0112 | Intake Air Temperature Circuit Low Input | - 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 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 engine coolant temperature (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 | - Short in ECT sensor circuit - ECT sensor - ECM |
Comes on | DTC stored | |
| P0118 | Engine Coolant Temperature Circuit High Input | - Open in ECT sensor circuit - ECT sensor - ECM |
Comes on | DTC stored | |
| P011C | Charge Air Temperature/Intake Air Temperature Correlation (Bank 1) | - Open or short in intake air temperature sensor (turbo) circuit - IAT sensor (built into mass air flow meter) - intake air temperature sensor (turbo) - 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 | - 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 | - Open or short in fuel pressure sensor circuit - Fuel pressure sensor - 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 | |
| P0234 | Turbocharger / Supercharger Overboost Condition | - E-VRV for turbocharger control - Open or short in E-VRV circuit - Turbocharger - Manifold absolute pressure sensor - ECM |
Comes on | DTC stored | |
| P0299 | Turbocharger / Supercharger Underboost | - E-VRV for turbocharger control - Open or short in E-VRV circuit - Turbocharger - Vacuum hose - EGR valve - Disconnected pipe between turbo and intake manifold - Disconnected MAP sensor hose - Manifold absolute pressure sensor - Injection system (reduction in fuel injection volume) - EGR does not close - Throttle valve stuck closed - ECM |
Comes on | DTC stored | |
| P0335 | Crankshaft Position Sensor "A" Circuit | - Open or short in crankshaft position sensor circuit - Crankshaft position sensor - No. 1 crankshaft position sensor plate (crankshaft) - ECM |
Comes on | DTC stored | |
| P0339 | Crankshaft Position Sensor "A" Circuit Intermittent | - Open or short in crankshaft position sensor circuit - Crankshaft position sensor - No. 1 crankshaft position sensor plate (crankshaft) - 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 - Camshaft timing sprocket - 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 - Air intake system (leaks or blockages) - Exhaust gas leaks - ECM - Mass air flow meter - Manifold absolute pressure sensor |
Comes on | DTC stored | |
| P0405 | Exhaust Gas Recirculation Sensor "A" Circuit Low | - Open or short in EGR valve position sensor circuit - EGR valve assembly (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 assembly (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 control motor circuit - ECM |
Comes on | DTC stored | |
| P0489 | Exhaust Gas Recirculation Control Circuit Low | - Open or short in EGR valve circuit - EGR valve assembly - ECM |
Comes on | DTC stored | |
| P0490 | Exhaust Gas Recirculation Control Circuit High | - Open or short in EGR valve circuit - EGR valve assembly - ECM |
Comes on | DTC stored | |
| P0500 | Vehicle Speed Sensor "A" | - Open or short in speedometer circuit - Speedometer assembly - ECM |
Comes on | DTC stored | |
| P0504 | Brake Switch "A" / "B" Correlation | - Open or short in stop light switch signal circuit - STOP fuse - IGN fuse - Stop light switch - ECM |
- | 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 | |
| P0560 | System Voltage | - Open in back up power source circuit (to BATT terminal) - Battery - Battery terminals - EFI MAIN fuse - 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 | - ST relay circuit - Clutch pedal switch*1 - Park/neutral position switch assembly*2 |
Comes on | DTC stored | |
| P0627 | Fuel Pump Control Circuit / Open | - Open or short in suction control valve circuit - Suction control valve - Fuel temperature sensor, suction control valve wire - ECM |
Comes on | DTC stored | |
| P062D | Fuel Injector Driver Circuit Performance Bank1 | - Open or short in injector driver (EDU) circuit - Fuel injector - EDU - ECM |
Comes on | DTC stored | |
| P0705*2 | Transmission Range Sensor Circuit Malfunction (PRNDL Input) | - Open or short in park/neutral position switch circuit - Park/neutral position switch assembly - Transmission control switch (Shift lock control unit assembly) - ECM |
Comes on | DTC stored | |
| P0724 | Brake Switch "B" Circuit High | - Short in stop light switch signal circuit - Stop light switch - 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 | Main: - Fuel injector - Injector driver (EDU) (P062D set simultaneously) - Connector connection (P062D set simultaneously) - Compression pressure Related: - Valve timing - Fuel with low cetane number used - ECM |
Comes on | DTC stored | |
| P1251 | Turbocharger / Supercharger Overboost Condition (Too High) | - E-VRV for turbocharger control - Open or short in E-VRV circuit - Turbocharger - EGR valve - Manifold absolute pressure sensor - ECM |
Comes on | DTC stored | |
| P1271 | Fuel Regulator Circuit Malfunction (EDU Drive) | - Open or short in pressure discharge valve circuit - Pressure discharge valve - EDU |
Comes on | DTC stored | |
| P1272 | Fuel Pressure Regulator Malfunction | - Open or short in pressure discharge valve circuit (P1271 is set simultaneously) - Pressure discharge valve - EDU - 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: - Exhaust gas temperature sensor - Air fuel ratio sensor - Mass air flow meter - Manifold absolute pressure sensor - Mass air flow meter - Fuel leaks or blockages in exhaust fuel addition injector - Suction control valve - Main injector - Blockages or leaks in air intake system - Blockages or leaks in exhaust system - Blockages or leaks in EGR system - ECM |
Comes on | DTC stored | |
| P1496 | Intake Air Temperature Sensor 1 Circuit Low | - Short in intake air temperature sensor (turbo) circuit - intake air temperature sensor (turbo) - ECM |
Comes on | DTC stored | |
| P1497 | Intake Air Temperature Sensor 1 Circuit High | - Open in intake air temperature sensor (turbo) circuit - intake air temperature sensor (turbo) - ECM |
Comes on | DTC stored | |
| P1601 | Injector Correction Circuit Malfunction (EEPROM) | - Fuel injector compensation code - Fuel injector pilot quantity learning value - Catalyst thermal deterioration code - A/F sensor compensation learning code - Crank time compensation learning code - ECM |
Comes on | DTC stored | |
| P1604 | Startability Malfunction | - Battery - Entry and start system - Engine immobiliser system - Irregular fuel - Lack of fuel - Suction control valve - Fuel injector - Fuel filter - 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 | |
| P1605*2 | Rough Idling | - Fuel injector - Fuel injector compensation code - Fuel leak - Glow system - Engine mounting insulator - Intake air system leakage - Intake air system blockage - EGR system - Throttle valve system - Suction control valve - Low quality fuel - Vehicle modifications - Fuel filter air bleed problem - Accessory problem (A/C, generator, etc.) - Engine assembly - ECM |
- | DTC stored | |
| P1607 | Cruise Control Input Processor | 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 (exhaust manifold converter sub-assembly) - Blockage in vacuum transmitting pipe sub-assembly for differential pressure sensor - Blockage in differential pressure sensor vacuum hose - Blockage in EGR passage - Exhaust fuel addition injector - Differential pressure sensor - Fuel injector assembly - Exhaust gas leaks in TOYOTA D-CAT - Mass air flow meter - Turbocharger sub-assembly - 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) - Abnormal rise in temperature due to melting of DPNR catalytic converter - 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 circuits are short-circuited - Accelerator pedal position sensor - Accelerator pedal - Accelerator pedal rod (arm) deformed - ECM |
Comes on | DTC stored | |
| P2141 | Diesel Throttle Motor Circuit Low | - Open or short in throttle actuator circuit - Diesel throttle valve assembly - ECM |
Comes on | DTC stored | |
| P2142 | Diesel Throttle Motor Circuit High | - Open or short in throttle actuator circuit - Diesel throttle valve assembly - ECM |
Comes on | DTC stored | |
| P2195 | Oxygen (A/F) Sensor Signal Stuck Lean (Bank 1 Sensor 1) | - A/F sensor - 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 | |
| P2237 | Oxygen (A/F) Sensor Pumping Current Circuit / Open (Bank 1 Sensor 1) | - Open or short in A/F sensor circuit - A/F sensor - A/F sensor heater - A/F relay - A/F sensor heater and relay circuit - 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 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 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 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 relay - A/F sensor heater and relay circuit - ECM |
Comes on | DTC stored | |
| P2453 | Diesel Particulate Filter Pressure Sensor "A" Circuit Range/Performance | - 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 | |
| P2454 | Diesel Particulate Filter Pressure Sensor "A" Circuit Low | - Open or short in differential pressure sensor circuit - Incorrect differential pressure sensor 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 differential pressure sensor hose routing - Differential pressure sensor - ECM |
Comes on | DTC stored | |
| P245C | EGR Cooler Bypass Control Circuit Low | - Open or short in EGR cooler VSV circuit - EGR cooler VSV - ECM |
Comes on | DTC stored | |
| P245D | EGR Cooler Bypass Control Circuit High | - Open or short in EGR cooler VSV circuit - EGR cooler VSV - ECM |
Comes on | DTC stored | |
| U0101*2 | Lost Communication with TCM | - ECM - TCM - ECM to TCM circuit |
Comes on | DTC stored | |
| U0129*2 | Lost Communication with Brake System Control Module | - CAN communication system - Brake actuator assembly (Skid control ECU) - ECM |
Comes on | DTC stored |
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*1: for Manual Transaxle
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*2: for Automatic Transaxle