Fail-Safe Chart [08/2013 - ]
WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
If any of the following DTCs are stored, the ECM enters fail-safe mode to allow the vehicle to be driven temporarily or stops fuel injection.
| DTC Code | Component | Fail-Safe Operation | Fail-Safe Deactivation Condition |
|---|---|---|---|
| P0031 P0032 P101D |
Air fuel ratio sensor heater | The ECM turns off the air fuel ratio sensor heater. | Power switch off |
| P0037 P0038 P102D |
Heated oxygen sensor heater | The ECM turns off the heated oxygen sensor heater. | Power switch off |
| P0102 P0103 |
Mass air flow meter sub-assembly | The ECM calculates ignition timing according to the engine speed and throttle valve position. | Pass condition detected |
| P0106 P0107 P0108 |
Manifold absolute pressure sensor | The ECM turns off EGR valve operate. | Pass condition detected |
| P0112 P0113 |
Intake air temperature sensor | The ECM estimates the intake air temperature to be 20°C (68°F). | Pass condition detected |
| P0115 P0117 P0118 |
Engine coolant temperature sensor | The ECM estimates the engine coolant temperature to be 80°C (176°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 | The ECM cuts off throttle actuator current and the throttle valve is returned to a 5.5° throttle position by the 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 |
| P0327 P0328 |
Knock control sensor | The ECM sets the ignition timing to maximum retard. | Power switch off |
| P0351 P0352 P0353 P0354 |
Ignition coil assembly | The ECM cuts the fuel injection. | Pass condition detected |
| P0401 P0403 |
EGR valve assembly | The ECM assumes that the EGR valve is closed, so that the ignition timing controlled to a safe value. | Pass condition detected |
| P261B | Engine water pump assembly | Output duty ratio of the WPO terminal repeats a cycle of 0% for 30 seconds and then 85% for 5 seconds.*2 | Power switch off |
| P261C | Engine water pump assembly | Output duty ratio of the WPO terminal remains at 0%.*2 | Power switch off |
| P261D | Engine water pump assembly | Output duty ratio of the WPO terminal remains at 0%.*2 | Power switch off |
HINT:
- *1: The vehicle can be driven slowly when the accelerator pedal is depressed firmly and slowly.
- *2: When the coolant temperature reaches 105°C (221°F), the engine is stopped and the hybrid system is solely used to driving vehicle.