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1991 Chevy Lumina Service Engine Soon Light

Tiny
PILOTBILL
  • MEMBER
  • 1991 CHEVROLET LUMINA
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.
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Tuesday, September 15th, 2009 AT 5:42 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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

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Tuesday, September 15th, 2009 AT 5:50 PM

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