Sunday, August 11, 2019

2020 Subaru Forester P code Page 47

Judge as OK when the malfunction criteria below continues for 10 seconds.

Time Needed for Diagnosis: 10 s

P0181

DTC P0181 FUEL TEMPERATURE SENSOR "A" CIRCUIT RANGE/PERFORMANCE

1. OUTLINE OF DIAGNOSIS

Detect faults in the fuel temperature sensor output properties. Diagnosis is performed in two methods (drift diagnosis and stuck diagnosis). If

either is NG, judge as NG. If both are OK, Judge as OK and clear the NG.

DRIFT DIAGNOSIS

Normally fuel temperature is lower than engine coolant temperature. When the fuel temperature becomes higher than the engine coolant

temperature, the range is considered to be shifted, and judged as NG.

STUCK DIAGNOSIS

As the engine warms up (cumulative amount of intake air after starting is large), if the fuel temperature which should rise does not, determine

as being stuck and NG.

2. COMPONENT DESCRIPTION

3. ENABLE CONDITION

DRIFT DIAGNOSIS

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

5. DIAGNOSTIC METHOD

Abnormality Judgment

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

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