Circuit Description

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Fuel level sensor changes resistance based on fuel level. When fuel tank is full, sensor resistance is high. PCM monitors changes on signal circuit to determine fuel level. This information is sent to fuel gauge.

Diagnostic checks for stuck fuel level sensor signal. If PCM determines fuel level signal appears to be stuck based on lack of signal variation, DTC will set.

DTC will set when the following conditions are present:

Fuel level left fuel tank indicates does not decrease by at least 0.8 gallon (3 liters).
More than 150 miles have been accumulated.