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.
FAIL-SAFE CHART
| DTC | Component | Fail-Safe Operation | Fail Safe Deactivation Condition | ||
|---|---|---|---|---|---|
| P0031, P0032, P0051 and P0052 | Air-Fuel Ratio (A/F) Sensor Heater | ECM turns off A/F sensor heater | Engine switch off | ||
| P0037, P0038, P0057 and P0058 | Heated Oxygen Sensor (HO2S) Heater | ECM turns off HO2 sensor heater | Engine switch off | ||
| P0087, P0088 | Fuel Pump for High Pressure |
|
Pass condition detected | ||
| P0100, P0102 and P0103 | Mass Air Flow (MAF) Meter | ECM calculates ignition timing according to engine speed and throttle valve position | Pass condition detected | ||
| P0110, P0112 and P0113 | Intake Air Temperature (IAT) Sensor | ECM estimates IAT to be 20°C (68°F) | Pass condition detected | ||
| P0115, P0117 and P0118 | Engine Coolant Temperature (ECT) Sensor | ECM estimates ECT to be 80°C (176°F) | Pass condition detected | ||
| P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0604, P0606, P0607, P0657, P2102, P2103, P2111, P2112, P2118, P2119 and P2135 | Electronic Throttle Control System (ETCS) | ECM cuts off throttle actuator current and throttle valve returns to 6.5° 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 opening angle to allow vehicle to continue at minimal speed(1). | Pass condition detected and then engine switch turned off | ||
| P0171, P0172, P0174, P0175 | Fuel trim | Air-fuel ratio feedback control is stopped | Pass condition detected and then engine switch turned off | ||
| P0190, P0192, P0193 | Fuel Pressure Sensor |
|
Pass condition detected and then engine switch turned off | ||
| P0200, P0201, P0202, P0203, P0204, P0205, P0206, P12FF | Injector Driver (EDU) |
|
Pass condition detected and then engine switch turned off | ||
| P0327, P0328, P0332 and P0333 | Knock Sensor | ECM sets ignition timing to maximum retard. | Engine switch off | ||
| P0351 to P0356 | Ignition Coil | ECM cuts fuel | Pass condition detected | ||
| P0504 | Stop light switch | Accelerator pedal angle is fixed | Pass condition detected | ||
| P1235 | Fuel Pump for High Pressure Side (spill valve) |
|
Pass condition detected | ||
| P1276, P1277, P1278, P1279, P127A, P127B | Fuel injector for port injection |
|
Pass condition detected and then engine switch turned off | ||
| P2238, P2239, P2241, P2242, P2252, P2253, P2255, P2256 | A/F sensor | Air-fuel ratio feedback control is stopped | Pass condition detected and then engine switch turned off | ||
| P2120, P2121, P2122, P2123, P2125, P2127, P2128 and P2138 | Accelerator Pedal Position (APP) Sensor | APP sensor has 2 sensor circuits: Main and Sub. If either of the circuits malfunctions, ECM controls engine using the other circuit. If both of the circuits malfunction, ECM regards accelerator pedal as being released. As a result, throttle valve is closed and engine idles. | Pass condition detected and then engine switch turned off | ||
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