If any of the following DTCs are set, the ECM enters fail-safe mode to allow the vehicle to be driven temporarily.
| DTC Code | Component | Fail-Safe Operation | Fail-Safe Deactivation Condition |
|---|---|---|---|
| P0011 | VVT system |
|
Pass condition detected |
| P0031 P0032 P101D |
Air fuel ratio sensor heater | ECM turns off air fuel ratio sensor heater. | Ignition switch off |
| P0037 P0038 P102D |
Heated oxygen sensor heater | ECM turns off heated oxygen sensor heater. | Ignition switch off |
| P0102 P0103 |
Mass air flow meter sub-assembly | ECM calculates ignition timing according to engine speed and throttle valve position. | Pass condition detected |
| P0112 P0113 |
Intake air temperature sensor | ECM estimates intake air temperature to be 20°C (68°F). | Pass condition detected |
| P0115 P0117 P0118 |
Engine coolant temperature sensor | ECM estimates engine coolant temperature to be 80°C (176°F). | Pass condition detected |
| P0120 P0121 P0122 P0123 P0220 P0222 P0223 P0604 P0606 P060A P060B P060D P060E P0657 P2102 P2103 P2111 P2112 P2118 P2119 P2135 |
Electronic throttle control system | ECM cuts off throttle actuator current and throttle valve is returned to 7° throttle position by return spring. ECM then adjusts engine output by controlling fuel injection (intermittent fuel-cut) and ignition timing in accordance with accelerator pedal angle to allow vehicle to continue to be driven at minimal speed*. |
Pass condition detected and then ignition switch turned off |
| P0327 P0328 |
Knock control sensor | ECM sets ignition timing to maximum retard. | Ignition switch off |
| P0336 | Crankshaft position sensor | Stop and start system is stopped. | Pass condition detected |
| P0351 P0352 P0353 P0354 |
Ignition coil assembly | ECM cuts fuel. | Pass condition detected |
| P0401 P0403 |
EGR valve assembly | ECM assumes that EGR valve is closed, so that ignition angle is controlled with safety valve. | Pass condition detected |
| P2120 P2121 P2122 P2123 P2125 P2127 P2128 P2138 |
Accelerator pedal position sensor | The accelerator pedal position sensor has 2 sensor circuits: Main and Sub. If either circuit malfunctions, ECM limits the engine output. If both circuits malfunction, ECM regards accelerator pedal as being released. As a result, throttle valve is closed and engine idles. |
Pass condition detected and then ignition switch turned off |
| P2237 P2238 P2239 P2252 P2253 |
Air fuel ratio sensor |
|
Pass condition detected and then ignition switch turned off |
Tech Tips
*: The vehicle can be driven slowly when the accelerator pedal is depressed firmly and slowly. If the accelerator pedal is depressed quickly, the vehicle may speed up and slow down erratically.