Section 4 (Engine Controls - Self-Diagnostics)
WARNING: This page is about a different car, the 2000 Lexus LS 400. However, it is still accessible from the selected car via links, so may be relevant.
- Diagnostic Trouble Code Identification
- Diagnostic Tests
- Notes
- DTC P0100: Mass Airflow (MAF) Sensor Circuit
- DTC P0101: Mass Airflow (MAF) Sensor Circuit Range/Performance Fault
- DTC P0110: Intake Air Temperature (IAT) Sensor Circuit Malfunction
- DTC P0115: Engine Coolant Temperature (ECT) Sensor Circuit Malfunction
- DTC P0116: Engine Coolant Temperature (ECT) Sensor Circuit Range/Performance Fault
- DTC P0120: Throttle Position (TP) Sensor Circuit Malfunction
- DTC P0121: Throttle Position (TP) Sensor Circuit Range/Performance Fault
- DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control
- DTC P0130 Or P0150: Heated Oxygen Sensor Circuit Malfunction
- DTC P0133 Or P0153: Heated Oxygen Sensor Circuit Slow Response
- DTC P0135 Or P0155: Heated Oxygen Sensor Heater Circuit
- DTC P0136 Or P0156: Heated Oxygen Sensor Circuit Malfunction
- DTC P0141 Or P0161: Heated Oxygen Sensor Heater Circuit
- DTC P0171 Or P0172: System Too Lean/Rich
- DTC P0300: Random Cylinder Misfire Detected
- DTC P0301-P0308: Cylinders No. 1-8 Misfire Detected
- DTC P0325 Or P0330: Knock Sensor Circuit Malfunction
- DTC P0335 Or P1335: Crankshaft Position (CKP) Sensor
- DTC P0340: Camshaft Position (CMP) Sensor Circuit
- DTC P0420 Or P0430: Catalyst System Efficiency Below Threshold
- DTC P0440: EVAP System Malfunction
- DTC P0441: Incorrect EVAP Purge Flow Or DTC P0446: EVAP Vent Control Fault
- DTC P0450: EVAP Pressure Sensor Malfunction Or DTC P0451: EVAP Pressure Sensor Range/Performance Fault
- DTC P0500: Vehicle Speed Sensor (VSS) Malfunction
- DTC P0505: Idle Control System Malfunction
- DTC P1120: Accelerator Position Sensor Circuit Malfunction
- DTC P1121: Accelerator Pedal Position Sensor Circuit Malfunction
- DTC P1125: Throttle Control Motor Circuit Malfunction
- DTC P1126: Electromagnetic Clutch Circuit Malfunction
- DTC P1127: Electronic Throttle Control System (ETCS) Actuator Power Source Circuit Malfunction
- DTC P1128: Throttle Control Motor Lock Malfunction
- DTC P1129: Electronic Throttle Control System (ETCS) Malfunction
- DTC P1200: Fuel Pump Relay Circuit
- DTC P1300, P1305, P1310, P1315, P1320, P1325, P1330 Or P1340: IGNITOR Circuit Malfunction
- DTC P1345 Or P1350: Variable Valve Timing (VVT) Sensor Circuit Malfunction
- DTC P1346 Or P1351: Variable Valve Timing (VVT)
- DTC P1349 Or P1354: Variable Valve Timing (VVT)
- DTC P1520: Stoplight Switch Signal Malfunction
- DTC P1600: ECM Batt Malfunction
- DTC P1633: Electronic Throttle Control System (ETCS) Circuit ECM Malfunction
- DTC P1645: Body Ecu Malfunction
- DTC P1656 Or P1663: Oil Control Valve (OCV)
- DTC P1780: Park/Neutral Position Switch Malfunction