SFI SYSTEM > FAIL-SAFE CHART |
| DTC Code | Component | Fail-Safe Operation | Fail-Safe Deactivation Condition |
| P0031 and P0032 | Air Fuel Ratio (A/F) Sensor Heater | ECM turns off A/F sensor heater. | Ignition switch off |
| P0037 and P0038 | Heated Oxygen (HO2) Sensor Heater | ECM turns off HO2 sensor heater. | Ignition switch off |
| P0105, P0107 and P0108 | Manifold absolute pressure sensor (MAP) | ECM calculates ignition timing according to engine speed and throttle valve position. | Pass condition detected |
| 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, P060A, P060B, P060D, P060E, P0657, P2102, P2103, P2118, P2119 and P2135 | Electronic Throttle Control System (ETCS) | ECM cuts off throttle actuator current and throttle valve is returned 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*. | Pass condition detected and then ignition switch turned off |
| P0401 | Exhaust Gas Recirculation Flow | ECM assumes that EGR valve is closed, so that ignition angle is controlled with safety valve | Pass condition detected |
| P0403 | Exhaust Gas Recirculation Control Circuit | ECM assumes that EGR valve is closed, so that ignition angle is controlled with safety valve | Pass condition detected |
| P0327 and P0328 | Knock Sensor | ECM sets ignition timing to maximum retard. | Ignition switch off |
| P0351, P0352 and P0353 | Igniter | ECM cuts fuel. | Pass condition detected |
| 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 circuit malfunctions, ECM controls engine using the other circuit. 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 and P2253 | Air Fuel Ratio (A/F) Sensor | Air fuel ratio feedback control is stopped | Pass condition detected and then ignition switch turned off |
