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#1
03-25-2007, 07:50 PM
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97 gp service engine light on steady
yes, i own a 1979 gp se with a 3.8 engine the service engine light comes and stays on. had a auto store hook a scanner and code 108 came up what is the problem any help would be appreciated. the mileage is 127,000
thank you Last edited by glc4122; 03-25-2007 at 08:23 PM. 
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#2
03-25-2007, 08:20 PM
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Re: 97 gp service engine light on steady
Welcome to AF.
It would be helpful to post your mileage. DTC P0108 means the MAP sensor circuit has a high input. To trigger the specific DTC the PCM module has to detect a short to low or an open in either the signal circuit or in the MAP sensor itself. So remove and reseat the electrical connector. Inspect for corrosion on the contacts or a broken wire. If that looks good then replace the MAP sensor. It is located on the right hand side (passenger) of the upper intake manifold plenum (UIM). Underneath it is the PCV valve. Very easy to replace DIY.
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