If any of the following DTCs are set, the ECM enters fail-safe mode to allow the vehicle to be driven temporarily.

DTCs	Components	Fail-Safe Operations	Fail-Safe Deactivation Conditions
P0011, P0015, P0021, P0025	VVT system	Idle up (control of combustion worsening) Stopping fuel cut control	Pass condition detected
P0031, P0032, P0051, P0052, P101D and P103D	Air fuel ratio sensor heater	ECM turns off air fuel ratio sensor heater	Ignition switch off
P0037, P0038, P0057, P0058, P102D and P105D	Heated oxygen sensor heater	ECM turns off heated oxygen sensor heater	Ignition switch off
P0102 and P0103	Mass air flow meter	ECM calculates ignition timing according to engine speed and throttle valve position	Pass condition detected
P0112 and P0113	Intake air temperature sensor	ECM estimates Intake air temperature to be 20°C (68°F)	Pass condition detected
P0115, P0117 and P0118	Engine coolant temperature sensor	ECM estimates engine coolant temperature sensor to be 80°C (176°F)	Pass condition detected
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0604, P0606, P060A, P060B, P060D, P060E, P0657, P1607, P2102, P2103, P2111, P2112, P2118, P2119 and P2135	Electronic throttle control system	ECM cuts off throttle actuator current and throttle valve returned to 6° 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 ignition switch turned off
P0300, P0301, P0302, P0303, P0304, P0305 and P0306*2	Fuel injector Electronic throttle control system	When misfire occurs, fuel cut is performed for catalyst overheat malfunction prevention During normal load and normal engine speed (MIL is blinking) - Fuel cut is performed on malfunctioning cylinder During high load and high engine speed (MIL is blinking) - Throttle valve opening angle control is performed - All cylinder fuel cut or malfunction cylinder fuel cut	Pass condition detected and then ignition switch turned off
P0327, P0328, P0332 and P0333	Knock Sensor	ECM sets ignition timing to maximum retard	Ignition switch off
P0351 to P0356	Igniter	ECM cuts fuel	Pass condition detected
P2120, P2121, P2122, P2123, P2125, P2127, P2128 and P2138	Accelerator pedal position sensor	Accelerator pedal position sensor has 2 sensor circuits: Main and Sub If either of circuits malfunctions, ECM controls engine using the other circuit If both of 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

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.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Fail-Safe Chart

Use the Manual With the Right Hardware

When to See a Mechanic

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