Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSLEXUS2002LX 470REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SELF-DIAGNOSTICS
2002 Lexus LX 470
Engine Controls - Self-Diagnostics
2002 Lexus LX 470SECTION Engine Controls - Self-Diagnostics
- Introduction
- Self-Diagnostic System
- Scan Tool Problems
- Summary
- Diagnostic Tests
- Notes
- DTC P0100: Mass Airflow (MAF) Meter Circuit
- DTC P0101: Mass Airflow (MAF) Meter Circuit Range/Performance
- DTC P0110: Intake Air Temperature (IAT) Sensor Circuit
- DTC P0115: Engine Coolant Temperature (ECT) Sensor Circuit
- DTC P0116: Engine Coolant Temperature (ECT) Sensor Circuit Range/Performance
- DTC P0120: Throttle (TP)/Pedal Position Sensor Switch "A" Circuit Malfunction
- DTC P0121: Throttle (TP)/Pedal Position Sensor Switch "A" Circuit Range/Performance Fault
- DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control
- DTC P0128: Thermostat Malfunction
- DTC P0130 Or DTC P0150: Heated Oxygen Sensor No. 1 Circuit
- DTC P0133 Or DTC P0153: Heated Oxygen Sensor No. 1 Circuit Slow Response
- DTC P0135 Or DTC P0155: Heated Oxygen Sensor No. 1 Heater Circuit
- DTC P0136 Or DTC P0156: Heated Oxygen Sensor No. 2 Circuit
- DTC P0141 Or DTC P0161: Heated Oxygen Sensor No. 2 Heater Circuit
- DTC P0150: Heated Oxygen Sensor No. 1 Circuit
- DTC P0153: Heated Oxygen Sensor No. 1 Circuit Slow Response
- DTC P0155: Heated Oxygen Sensor No. 1 Heater Circuit
- DTC P0156: Heated Oxygen Sensor No. 2 Circuit
- DTC P0161: Heated Oxygen Sensor No. 2 Heater Circuit
- DTC P0171, DTC P0172, DTC P0174 Or DTC P0175
- DTC P0300: Random Misfire Detected
- DTC P0301, DTC P0302, DTC P0303, DTC P0304, DTC P0305, DTC P0306, DTC P0307 Or DTC P0308
- DTC P0325 Or DTC P0330
- DTC P0335 Or P1335: Crankshaft Position (CKP) Sensor Circuit
- DTC P0340: Camshaft Position (CMP) Sensor Circuit
- DTC P0420 Or P0430: Catalyst System Efficiency Below Threshold
- DTC P0440: Evaporative Emission Control System
- DTC P0441 Or DTC P0446
- DTC P0450 Or DTC P0451
- DTC P0500: Vehicle Speed Sensor Circuit
- DTC P0505: Idle Air Control (IAC) System Circuit
- DTC P1120: Accelerator Pedal Position (App) Sensor Circuit
- DTC P1121: Accelerator Pedal Position (App) Sensor Range/Performance
- DTC P1125: Throttle Control Motor Circuit
- DTC P1126: Magnetic Clutch Circuit
- DTC P1127: Electronic Throttle Control System Actuator Power Source Circuit
- DTC P1128: Throttle Control Motor Lock Circuit
- DTC P1129: Electronic Throttle Control System Circuit
- DTC P1200: Fuel Pump Relay/Ecu Circuit
- DTC P1300, DTC P1305, DTC P1310, DTC P1315, DTC P1320, DTC P1325, DTC P1330 Or DTC P1340
- DTC P1335: Crankshaft Position (CKP) Sensor Circuit
- DTC P1520: Stoplight Switch Signal Circuit
- DTC P1600: ECM Batt Circuit
- DTC P1633: ECM Malfunction (Electronic Throttle Control System Circuit)
- DTC P1780: Park/Neutral Position (PNP) Switch Circuit
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.