1991 Chevy Lumina Service Engine Soon Light

1991 CHEVROLET LUMINA
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PILOTBILL
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Electrical problem
1991 Chevy Lumina 6 cyl Front Wheel Drive 266440 miles

When I start slowing down (like at a Red light) my SERVICE ENGINE SOON light comes on. The light will not go back off unless I pull over and shut the engine off. Once I restart the car, the light will stay off untill I start slowing down again, then the light will come right back on. The speed that the light comes back on is always when the engine drops below 50mph. I have tried to speed back up again, when I can, above 50mph but the light will not go off unless I pull over and shut the engine off and then restart the engine.
Sep 15, 2009 at 5:42 PM
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RASMATAZ
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Thanks for the donation You need to have the computer scanned for code/s there's a problem within the engine management system causing the light to come on. Take it to Autozone its a free service to pull the code/s Or you can use a jumper wire on the A to B terminal on the DLC see below to flash the code/s. This is your starting point finding out what's wrong.


https://www.2carpros.com/forum/automotive_pictures/12900_GM_ALCL_42.jpg

Sep 15, 2009 at 5:50 PM