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Thread: Knock Sensor Failing

  1. #1
    Join Date
    Dec 2009
    Location
    Calexico, California, USA
    Posts
    325
    My Cars
    1996 BMW z3 M44

    Knock Sensor Failing

    Just about 2 days ago I had the knock sensor fail and throw me a check engine light. Until I get around to replacing the sensor what symptoms will the car have? Is the timing delayed to ensure the motor doesn't destruct itself; I assume the ECU adjusts timing based on pinging from the sensor correct? I appreciate the help; thank you.

  2. #2
    Join Date
    May 2008
    Location
    CNJ
    Posts
    1,163
    My Cars
    '97 Z3 1.9 DASC Auto
    Which engine do you have? The knock sensor code is for one of three problems:

    1. open circuit
    2. short circuit
    3. values out of range

    I would check all of the wiring going to and from the knock sensor to eliminate any short or open circuit. You might also want to clean your DME connections for the knock sensors as well.

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