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Thread: WJ check light problem.

  1. #1
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    WJ check light problem.

    We have a WJ [2002] that the check light has been coming on and off of. Thought it was the gas cap, but have finally ruled that out.
    It's spitting a cod 173 [transmission] and that's about it.
    Symptoms are it usually comes on after a getting gas, and after a while goes away. [this last time it seems to not want to though] While the CEL is on, when accelerating, it seems to be sluggish and underpowered.

    Anyone have an idea or know what's going on with this?

    TIA
    ... my dogma ran over your karma ...
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    2000 WJ - it starts again.
    1998 ZJ RIP jan19.2012
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  2. #2
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    Some of the WJ's were known to have a problem with the throttle position sensor...
    you may want to have yours checked out...

  3. #3
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    Trouble code link below.
    Take it to a dealer. There should be no charge to pull the codes, but make sure first, some are just pricks.
    The code your giving describes fuel problem. Cap, plug, injector, o2 sensor. You need to have them pulled. If it's tranny the most common are the out/input speed sensors and the internal solenoid pack. Both relatively easy and cheap to fix. If it's tranny though, you'd know it.

    http://www.wjjeeps.com/faultcodes.htm#0800

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    First and cheapest thing to check is vacuum leaks. All around the intake manifold and throttle body. After that you're looking I'd either start looking the sensors(voltages): Mass air meter, O2's, injectors).
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  5. #5
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    Thanks! Will see what we can figure out with it.

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