Tuesday, July 2, 2019

2020 Subaru Forester P code Page 147

Time Needed for Diagnosis: Less than 1 second

P0464

DTC P0464 FUEL LEVEL SENSOR CIRCUIT INTERMITTENT

1. OUTLINE OF DIAGNOSIS

Detect the unstable output faults from the fuel level sensor caused by noise. Judge as NG when the max. value and cumulative value of

output voltage variation of the fuel level sensor is larger than the threshold value.

2. ENABLE CONDITION

3. GENERAL DRIVING CYCLE

- Always perform the diagnosis continuously at idle speed.

- Pay attention to the fuel level.

4. DIAGNOSTIC METHOD

Calculate the Max. value (DELFLMAX) and cumulative value (SUMFL) of output voltage variation of fuel level sensor during 12.2 seconds.

Judge it normal when both max. and cumulative values are not over the threshold value. Otherwise, when either of them is over the threshold

value, the diagnosis counter counts up. Judge as NG if the counter indicated 4 time(s).

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