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 |
|---|---|---|---|
| P0031, P0032, P0051, P0052, P101D and P103D | Air fuel ratio sensor heater | ECM turns off air fuel ratio sensor heater | Power switch off |
| P0037, P0038, P0057, P0058, P102D and P105D | Heated oxygen sensor heater | ECM turns off heated oxygen sensor heater | Power switch off |
| P0102 and P0103 | Mass air flow meter sub-assembly | ECM calculates ignition timing according to engine speed and throttle valve position | Pass condition detected |
| P0107 and P0108 | Manifold absolute pressure sensor | ECM calculates ignition timing according to engine speed and throttle valve position | Pass condition detected |
| P0112 and P0113 | Intake air temperature sensor | ECM estimates intake air temperature sensor to be 20°C (68°F) | Pass condition detected |
| P0115, P0117 and P0118 | Engine coolant temperature sensor | ECM estimates engine coolant temperature sensor 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 and P2135 | Electronic throttle control system | The ECM cuts off throttle actuator current and the throttle valve returns to 6° throttle position by return spring The ECM then adjusts engine output by controlling fuel injection (intermittent fuel cut) and ignition timing in accordance with accelerator pedal opening angle to allow vehicle to continue at minimal speed*1 |
Pass condition detected and then power switch turned off |
| P0327, P0328, P0332 and P0333 | Knock control sensor | The ECM sets ignition timing to maximum retard | Power switch off |
| P0351, P0352, P0353, P0354, P0355 and P0356 | Igniter | The ECM cuts fuel | Pass condition detected |
| P0401 | Exhaust Gas Recirculation Flow | ECM assumes that EGR valve is closed, and ignition advance is controlled to a safe value | Pass condition detected |
| P0403 | Exhaust Gas Recirculation Control Circuit | ECM assumes that EGR valve is closed, and ignition advance is controlled to a safe value | Pass condition detected |
NOTE:
- *1: The vehicle can be driven slowly when the accelerator pedal is depressed slowly. If the accelerator pedal is depressed quickly, the vehicle may speed up and slow down erratically.
- *2: Misfire related fail-safe operations occur when catalyst overheat malfunctions occur.