Auto Mechanics a little help please.

Discussion in 'Archived Threads 2001-2004' started by brentl, May 27, 2002.

  1. brentl

    brentl Cinematographer

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    This should be simple for you guys/girls

    2 or 3 times in the last month I've had the "service engine soon" light come on. It only stays on for about 15 seconds and then goes out. It only happens when it's cold(45-55DF)

    I checked for a code, and it only came up with a code 43. I'm sure it's a sensor of some kind but I'm not sure which one

    It ahsn't happened in the last 1 1/2 weeks. Could the sensor has failed completely and be operating at default??

    Could a code 43 affect my upcoming emissions test.

    I have a 1991 Pontiac Gooole(6000 le) with a 3.1L engine.

    I just hope it's simple!

    Thanks
    Brent
    P.s. I guess I'll do my O2 sensor since it's pretty cheap ...
     
  2. Todd Hochard

    Todd Hochard Cinematographer

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    Check the code here. 43 says low voltage to EST circuit.
    You should check the battery voltage, with the car idling. It should be close to 14 volts, and should go to 14.2-14.4 when the engine is revved just above idle.
    Also, check the power supply going to the ignition coils for each cylinder. I'm pretty sure this model has the distributorless ignition system. Make sure all connections to these modules are tight, and free of corrosion.
    Todd
     
  3. Zen Butler

    Zen Butler Producer

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  4. Wes

    Wes Screenwriter

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    Try removing your battery cables and cleaning the terminals, and the wire ends!

    Wes
     
  5. brentl

    brentl Cinematographer

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    Like I said, it hasn't happened in a going on 2 weeks.

    I'll run into Canadian Tire and get them to check it. the alternator is only 6 months old, so it SHOULD be fine. Time to look at the battery.

    Hopefully it isn't a coil pack or module, that's somethin I've never done.

    Brent L
     

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