GSIC - Global Service Information Center

# SFI SYSTEM > FAIL-SAFE CHART

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If any of the following codes are recorded, the ECM enters fail-safe mode.

DTC No. | Item | Fail-safe Operation | Fail-safe Deactivation Condition
P0031 P0032 | Air-Fuel Ratio Sensor | A/F heater is turned off | Ignition switch turned OFF
P0037 P0038 | Heated Oxygen Sensor | Heated Oxygen Sensor (HO2S) heater is turned off | Ignition switch turned OFF
P0100/31 P0102/31 P0103/31 | Mass Air Flow Meter | If engine is running at over 3,000 rpm, ECM performs fuel cut. | "Pass" condition detected
P0110/24 P0112/24 P0113/24 | Intake Air Temperature Sensor | ECM fixes intake air temperature at 20°C (68°F). | "Pass" condition detected
P0115/22 P0117/22 P0118/22 | Engine Coolant Temperature Sensor | ECM fixes engine coolant temperature at 80°C (176°F). | "Pass" condition detected

P0120/41
P0122/41
P0123/41
P0220/41
P0222/41
P0223/41
P2102/41
P2103/41
P2111/41
P2112/41
P2118/89
P2119/89
P2135/41

Electronic Throttle Control System

If electronic throttle control system is malfunctioning, ECM cuts off current to throttle actuator. Throttle control valve returns to predetermined throttle position (approximately 6.5°) by force of return spring.
Then, required engine power is calculated by using ignition timing and accelerator pedal position. Engine is controlled by intermittent fuel-cut. If accelerator pedal is depressed firmly and slowly, vehicle can be driven at minimum speed. If accelerator pedal is depressed quickly, vehicle may speed up and slow down erratically.

"Pass" condition detected and then ignition switch turned to OFF

P0325/52 P0327/52 P0328/52 | Knock Sensor | ECM sets ignition timing delay to maximum. | Ignition switch turned OFF
P0351/14 P0352/15 P0353/14 P0354/15 | Igniter | If engine is running at over 500 rpm, ECM performs fuel cut in malfunctioning cylinders. Engine performs fuel cut in all cylinders if: 1) engine is running at over 1500 rpm, and 2) engine load rate is 20 to 89% or more. | "Pass" condition detected

P2120/19
P2121/19
P2122/19
P2123/19
P2125/19
P2127/19
P2128/19
P2138/19

Accelerator Pedal Position Sensor

Engine is stuck on idle or output is limited.

"Pass" condition detected and then ignition switch turned OFF