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Disconnecting the negative battery terminal for 10+ minutes usually resets the Service Engine Soon" light. Please note that it will reset everything else electrical in your car as well (e.g.- radio and clock). If the light reappears shortly after reconnecting and restarting the vehicle you will need to get the code read and go from there. If nothing noticable most likely an O2 sensor.

You can also pull the the fuse/breaker marked PCM/IGN from the electrical center under the hood. The box is on the passenger side under a marked plastic cover between the edge of the fender and the diagonal strut/support.

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โˆ™ 2015-07-15 19:15:45
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Q: How do you reset the 'service engine soon' light on a 1992 Pontiac Grand Prix?
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