Intermittant check engine light

Discussion in 'General Motoring' started by Cletus S. Yokel, Aug 15, 2003.

  1. I have a bizzare problem with my 2000 Legacy Outback Wagon. The check
    engine light comes on sometimes for days, then goes out, sometimes for days,
    then comes back on, etc. I had the codes checked and the indication was
    "defective heater element, front 02 sensor. I replaced it...same ol' shit.
    Same code. Sometimes CEL is on, sometimes it's off. Clear the codes, same
    one comes back.

    Ideas?
     
    Cletus S. Yokel, Aug 15, 2003
    #1
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  2. Cletus S. Yokel

    someone Guest


    Sounds like a connection/wiring problem in the front O2 sensor CIRCUIT.
    Somewhere between the ECM and the sensor.....
     
    someone, Aug 15, 2003
    #2
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  3. Cletus S. Yokel

    Edward Hayes Guest

    There are 3 O2 sensors. Any chance it's a different one than the one you
    changed?
     
    Edward Hayes, Aug 15, 2003
    #3
  4. Cletus S. Yokel

    TG Guest

    could be the exhaust gaskets. TG
     
    TG, Aug 16, 2003
    #4
  5. Cletus S. Yokel

    Bud Guest

    Get an ohmmeter and check the remaining O2 sensor heaters, one of them is
    open.
     
    Bud, Aug 16, 2003
    #5
  6. I still don't get why this would be intermitant. Also, the car runs
    perfectly whether the CEL is on or not.

    I was thinking along the lines that it may be a loose connection, but
    considering the age of the car and the types of connectors involved, I doubt
    that is the problem.
     
    Cletus S. Yokel, Aug 19, 2003
    #6
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