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.
2012 Lexus LS 600hLFACTORY OEM SERVICE PROCEDURE
Fail-Safe Chart
If any of the following DTCs are set, the ECM enters fail-safe mode to allow the vehicle to be driven temporarily.
| DTC | Component | Fail-safe Operation | Fail-safe Deactivation Condition |
|---|---|---|---|
| P0010, P0020, P0016, P0017, P0018, P0019, P1023, P1360, P1361, P1362, P1363, P2614 | Camshaft Timing Control Motor |
|
Pass condition detected and then power switch turned off |
| P0011, P0021 | VVT System Circuit |
|
Pass condition detected and then power switch turned off |
| P0012, P0022 | VVT System Circuit |
|
Pass condition detected and then power switch turned off |
| P0016, P0017, P0018, P0019 | Valve Timing Deviation |
|
Pass condition detected and then power switch turned off |
| P0031, P0032, P0051, P0052 | Air-Fuel Ratio (A/F) Sensor Heater | ECM turns off A/F sensor heater | power switch off |
| P0037, P0038, P0057, P0058 | Heated Oxygen Sensor (HO2S) Heater | ECM turns off HO2 sensor heater | power switch off |
| P0087, P0088 | Fuel Pump for High Pressure |
|
Pass condition detected |
| P0102, P0103, P010C, P010D | Mass Air Flow (MAF) Meter | ECM calculates ignition timing according to engine speed and throttle valve position | Pass condition detected |
| P00AC, P00AD, P0112, P0113 | Intake Air Temperature (IAT) Sensor | ECM estimates IAT to be 20Β°C (68Β°F) | Pass condition detected |
| P0115, P0117, P0118 | Engine Coolant Temperature (ECT) Sensor | ECM estimates ECT to be 80Β°C (176Β°F) | Pass condition detected |
| P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0604, P0606, P060A, P060B, P060E, P0657, P2102, P2103, P2111, P2112, P2118, P2119, P2135 | Electronic Throttle Control System (ETCS) | ECM cuts off throttle actuator current and throttle valve returns to 7Β° throttle position by return spring. The ECM stops the engine and the vehicle can be driven using solely the hybrid system*1. | Pass condition detected and then power switch turned off |
| P0190, P0192, P0193 | Fuel Pressure Sensor |
|
Pass condition detected and then power switch turned off |
| P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P062D, P062E | Injector Driver (EDU) |
|
Pass condition detected and then power switch turned off |
| P0327, P0328, P0332, P0333 P032C, P032D, P033C, P033D | Knock Sensor | ECM sets ignition timing to maximum retard | power switch off |
| P0351 to P0358 | Ignition Coil | ECM cuts fuel | Pass condition detected |
| P1235, P1236 | Fuel Pump for High Pressure Side (Spill Control Valve) |
|
Pass condition detected |
| P1276, P1277, P1278, P1279, P127A, P127B, P127C, P127D | Fuel Injector for Port Injection |
|
Pass condition detected and then power switch turned off |
| P2237, P2238, P2239, P2240, P2241, P2242, P2252, P2253, P2255, P2256 | A/F Sensor | Air-fuel ratio feedback control is stopped | Pass condition detected and then power switch turned off |
NOTE:
- *1: The vehicle can be driven slowly when the accelerator pedal is depressed firmly and slowly.
- *2: Misfire related fail-safe operations occur when catalyst overheat malfunctions occur.
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
