Fail-Safe Chart
If any of the following DTCs are stored, 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 and P0052 | Air-Fuel Ratio (A/F) Sensor Heater | The ECM turns off the A/F sensor heater. | Engine switch off |
| P0037, P0038, P0057 and P0058 | Heated Oxygen (HO2) Sensor Heater | The ECM turns off the HO2 sensor heater. | Engine switch off |
| P0102 and P0103 | Mass Air Flow (MAF) Meter | The ECM calculates ignition timing according to the engine speed and throttle valve position. | Pass condition detected |
| P0110, P0112 and P0113 | Intake Air Temperature (IAT) Sensor | The ECM estimates the IAT to be 20°C (68°F). | Pass condition detected |
| P0115, P0117 and P0118 | Engine Coolant Temperature (ECT) Sensor | The ECM estimates the ECT 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 and P2135 | Electronic Throttle Control System (ETCS) | The ECM cuts off throttle actuator current and the throttle valve is returned to a 7° throttle position by the return spring. The ECM then adjusts the engine output by controlling fuel injection (intermittent fuel cut) and ignition timing in accordance with the accelerator pedal opening angle to allow the vehicle to continue at minimal speed*1. |
Pass condition detected and then engine switch turned off |
| P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and P0308*2 |
|
When a misfire occurs, fuel cut is performed for catalyst overheat malfunction prevention.
|
Pass condition detected and then engine switch turned off |
| P0327, P0328, P032C, P032D, P0332, P0333, P033C and P033D | Knock Sensor | The ECM sets the ignition timing to maximum retard. | Engine switch off |
| P0351 to P0358 | Ignition Coil | The ECM cuts fuel. | Pass condition detected |
| P0504 | Stop Light Switch | The accelerator pedal angle is fixed. | Accelerator pedal angle is fixed |
| P2120, P2121, P2122, P2123, P2125, P2127, P2128 and P2138 | Accelerator Pedal Position (APP) Sensor | The APP sensor has 2 sensor circuits: Main and Sub. If either circuit malfunctions, the ECM controls the engine using the other circuit. If both circuits malfunction, the ECM regards the accelerator pedal as being released. As a result, the throttle valve is closed and the engine idles. |
Pass condition detected and then engine switch turned off |
| P2432, P2433, P2437 and P2438 | Secondary Air Injection System | Throttle valve opening angle control is performed. | Pass condition detected |
| P2440 and P2442 | Secondary Air Injection System | Throttle valve opening angle control is performed. | Pass condition detected |
| P2445 and P2447 | Secondary Air Injection System | Throttle valve opening angle control is performed. | Pass condition detected |
HINT:
- *1: 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.
- *2: Misfire related fail-safe operations occur when catalyst overheat malfunctions occur.