Question about 2004 Chevrolet Malibu Maxx

2 Answers

The light comes on even after I have taken it to the repair shop. They say there is no code that comes up in the computer and that they have "reset" the light (whatever that means). They can't figure out what it is and the light came on again the next day. Also, possibly unrelated the great shift gets stuck from time to time when trying to shift from park to reverse or drive. Can anyone shed some light on the possible cause of the light?

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  • Chevrolet Master
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The service engine soon light should go on when there is a hard code set in the computer.

One can use an OBD-II Scanner in vehicles made in 1996 or later to 'erase code' but if there is a problem in the engine, the computer will come up with a hard code immediately.

Only, with intermittent codes can the 'erase code' button get rid of the light for any length of time.

Also, if there is no service engine soon light at all (ignition on before starting), then the ECM (Electronic Control Module) or PCM (Powertrain Control Module) is bad.

Similarly, I if the l ight goes on but there is no code stored, that might point to a PCM problem existing where the PCM should be replaced to get rid of the light.
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Also, the problem with getting it out of Park to Reverse or Drive is usually a bad brake switch which sends a signal to unlock the shifter when the brake pedal is depressed. This is a separate issue.

I wish you luck on these repairs.

Posted on Aug 06, 2010

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  • Chevrolet Master
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There 100s of diffrent thing that can make the light come on, if the light is on then there a code, you need a diffrent repair shop, this may be related to the shifter problem but you would need to retrive the code first.next time the light comes on go to autozone parts store they scan it for free and then you will have the code if they say theres no code then there lieing, there a shift lock seloniod that locks the shifter and is operated through the brake light switch so it will not allow shifting unless brake is pressed, this is for coming out of park or cgoing to drive and reverse.

Posted on Aug 06, 2010

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