P2266 WATER IN FUEL (WIF) SENSOR VOLTAGE TOO LOW

When Monitored and Set Condition:

When Monitored: Ignition on.
Set Condition: Low voltage detected at the WIF signal circuit at the ECM.

POSSIBLE CAUSES

• OTHER DTC'S PRESENT
• WATER IN FUEL
• ECM
• INTERMITTENT CONDITION

DIAGNOSTIC PROCEDURE

NOTE: Refer to VERIFICATION TESTS for appropriate verification test procedures.

1. With the DRBIII®, read DTCs. Do you have any additional water in fuel DTCs?
   Yes --> Repair other Water in fuel sensor DTCs first. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
   No --> Go To 2
2. Using the service publications as a guide, drain the water in fuel separator. Did the DTC become inactive after draining the water in fuel separator?
   Yes --> Clear DTC, repair complete. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
   No --> Go To 3
3. Disconnect the WIF sensor harness connector.
   NOTE: Check connectors - Clean/repair as necessary.
   Using the DRBIII®, monitor for DTCs while connecting a jumper wire between the (G123) signal circuit of the water in fuel sensor and battery voltage. Did the water in fuel light go out?
   Yes --> Refer to the SYMPTOM: INTERMITTENT CONDITION Symptom (Diagnostic Procedure). Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
   No --> Replace and program the ECM in accordance with the Service Information. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).