P2264-WATER IN FUEL VOLTAGE BELOW LOWER LIMIT

For a complete wiring diagram Refer to Section 8W

When Monitored:
With the ignition on.
Set Condition:
The Water In Fuel Sensor signal is below 0.51 volts for 0.2 second.

Possible Causes

WATER IN FUEL SENSOR

WATER IN FUEL SENSOR SIGNAL CIRCUIT SHORTED TO CHASSIS GROUND

WATER IN FUEL SENSOR SIGNAL CIRCUIT SHORTED TO WATER IN FUEL SENSOR GROUND

Diagnostic Test

1.CHECK FOR ACTIVE DTC

NOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions under which the DTC was set. Some of these conditions are displayed on the scan tool at the same time the DTC is displayed.

NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for an active DTC.

Did this DTC set again?

Yes

Go To2

Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

2.WATER IN FUEL SENSOR

Is the voltage above 4.8 volts?

Yes

Replace the Water In Fuel Sensor in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Go To 3

3.WATER IN FUEL SENSOR SIGNAL CIRCUIT SHORTED TO GROUND

Is the resistance above 1000 ohms?

Yes

Go To4

Repair the Water In Fuel Sensor Signal circuit for a short to ground.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

4.WATER IN FUEL SENSOR SIGNAL AND GROUND CIRCUITS SHORTED TOGETHER

Is the resistance above 1000 ohms?

Yes

Replace and program the Front Control Module in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Repair the Water In Fuel Sensor Signal and Ground circuits for a short together.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).