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  • P0169 - Water In Fuel Detected For Too Long

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    P0169 - Water In Fuel Detected For Too Long

    Theory of Operation

    There are two Water-In-Fuel (WIF) sensors attached to the two fuel filters. WIF 1 is attached to the fuel filter mounted on the engine. WIF 2 is attached to a 2nd fuel filter that can now be found mounted to the chassis. The Powertrain Control Module (PCM) provides a 5-Volt reference signal to each WIF sensor. When the water collected in the respective fuel filter covers the sensor probes, the sensor then pulls the 5-Volt reference voltage low indicating high water accumulation in that fuel filter.

    When Monitored:

    While the engine is running.

    Set Condition:

    Water-In-Fuel light was on for a calibrated amount of time.

    Possible Causes

    WATER IN FUEL
    Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

    OTHER DTCS PRESENT

    1. With the scan tool, read DTCs. Is P2269 displayed?

     

    Yes
    • Repair P2269 DTC first.
    • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

     

    No
    • Drain water from both fuel filters.
    • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).


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