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.
1997 Toyota Land CruiserFACTORY OEM SERVICE PROCEDURE
Engine Controls - Tests W/Codes
- Introduction
- Self-Diagnostic System
- Scan Tool Problems
- Summary
- Circuit Tests
- Notes
- DTC P0100: Mass Airflow (MAF) Sensor Circuit
- DTC P0101: Mass Airflow (MAF) Sensor Circuit Range/Performance Problem
- 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 Problem
- DTC P0120: Throttle Position (TP) Sensor Circuit Malfunction
- DTC P0121: Throttle Position (TP) Sensor Circuit Range/Performance Problem
- DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control
- DTC P0130: Heated Oxygen Sensor Circuit (Sensor No. 1)
- DTC P0133: Heated Oxygen Sensor Circuit (Sensor No. 1) Slow Response
- DTC P0135: Heated O2 Sensor CKT (Sensor 1), DTC P0141: Heated O2 Sensor CKT (Sensor 2)
- DTC P0136: Heated Oxygen Sensor Circuit (Sensor No. 2)
- DTC P0171: System Too Lean (Fuel Trim), DTC P0172: System Too Rich (Fuel Trim)
- DTC P0300: Random Misfire Detected
- DTC P0301: Cylinder No. 1 Misfire Detected, DTC P0302: Cylinder No. 2 Misfire Detected, DTC P0303: Cylinder No. 3 Misfire Detected, DTC P0304: Cylinder No. 4 Misfire Detected, DTC P0305: Cylinder No. 5 Misfire Detected, DTC P0306: Cylinder No. 6 Misfire Detected
- DTC P0325: Knock Sensor No. 1 Circuit, DTC P0330: Knock Sensor No. 2 Circuit
- DTC P0335 Or P1335: Crankshaft Position (CKP) Sensor "A" Circuit
- DTC P0340: Camshaft Position (CMP) Sensor Circuit
- DTC P0385: Crankshaft Position (CKP) Sensor "B" Circuit
- DTC P0401: Insufficient Exhaust Gas RECIRCULATION (EGR) Flow Detected
- DTC P0402: Excessive Exhaust Gas RECIRCULATION (EGR) Flow Detected
- DTC P0420: Catalyst System Efficiency Below Threshold
- DTC P0500: Vehicle Speed Sensor Malfunction
- DTC P0505: Idle Air Control (IAC) System Malfunction
- DTC P0510: Closed Throttle Position (CTP) Switch Malfunction
- DTC P1300: IGNITOR Circuit Malfunction
- DTC P1335: Crankshaft Position (CKP) Sensor Circuit
- DTC P1520: Stoplight Switch Signal Malfunction (1.8L A/T Only)
- DTC P1600: ECM Batt Malfunction
- DTC P1605: Knock Control CPU Malfunction
- DTC P1780: Park/Neutral Position (PNP) Switch
Factory Service Tools
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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.
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