91 LeBaron 3.0V6 fault code 22?

Discussion in 'LeBaron' started by billccm, Mar 20, 2008.

  1. billccm

    billccm Guest


    My 1991 LeBaron is having an issue where the Check Engine Light will
    come on evrey 5th, or 6th HOT start. It never comes on on a cold
    start, and only ever so often will it come on after a HOT start.

    Codes are 12, 22, 55.

    The car has 97K miles, and all sensors are orignal (except 02 sensor).

    I have noticed also that WARM idle seems rough on occasion. This car
    has spoiled me as silky smooth at idle since new, so I have noticed
    the rough idle immediately.

    No other issues; thermostat is working well (and is less than 2 years
    old), no over heating, great MPG (23 in the city).

    So, should I just change out the coolant temp sensor? I assume it is a
    cheap enough part to try as a first step.

    Thanks for any advice!

    billccm, Mar 20, 2008
  2. billccm

    Mike Guest

    The fault code, # 22, indicates a problem with the coolant temp sensor. The
    first thing to do is check the connector to that sensor to make sure it is
    clean and tight. If you don't see anything obvious I would go ahead and
    replace the sensor. The coolant temp sensor you are looking for is for the
    computer and is not the one that runs the temp guage in the dash.
    Mike, Mar 20, 2008
  3. billccm

    damnnickname Guest

    It is a coolant sensor fault and the cheapest guess would be to replac the
    coolant temp sensor and check for agood connection. Whe the sensor detects
    a fault it puts the controller into a default setting that turns the
    raditor fan on annd the timing is not controlled by the computer. it goes
    into a default 12 degree advance only and will cause the engine to run

    Glenn Beasley
    Chrysler Tech
    damnnickname, Mar 20, 2008
  4. billccm

    Kees Guest

    12 means electricity problem.
    Kees, Mar 21, 2008
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