Question about Chevrolet Lumina

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1991 chevy lumina sedan, code p44. changed out o2 sensor. no change. please advise. calls stalls at idle. cruise fine.

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  • edward lai May 03, 2010

    i disconnected the batt. wouldn't that reset the code. what about the idling problem. please advise.



  • edward lai May 03, 2010

    i erased it with an obd1 scanner, drove it, it came back on. where else should i look? thanks in advance. please advise

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Have you done a reset since you have changed the O2 sensor? If not then this is the part you have missed. After any repair or fix, you are required to reset the ECM(engine control management) by using a diagnostic equipment.Hope this helps.

Posted on May 03, 2010

  • 1 more comment 
  • heeman mohun May 03, 2010

    Disconnecting the battery does not always reset the ECM, that is a myth and does not always work.Best solution is to have a diagnostic device attached to the vehicle. Pre 1997 vehicle uses obd1 and post 1997 uses obd2 technology. These are 2 different and you need the right one for your vehicle.

  • heeman mohun May 03, 2010

    If there was any further errors picked up then it would have come up with a code. So I would suggest you do what I have explained and if there is no errors being picked up and you are still having an idling problem then come back to us and we will try to help. Idling problem is due to many reasons and it could be a dirty idle controller etc and etc.But once you do not have any error coming back and it still does not idle properly then let me know and I will advise you on the next step.For now, follow what I explained and see what happens.

  • heeman mohun May 03, 2010

    I have not checked what does code p44 means and if an error is coming back then it means that the ECM has picked a problem and most probably not associated with the repair you have done.

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