1986 Oldsmobile 442 Service Engine Soon

1986 OLDSMOBILE 442
65,550 MILES • V8 • 2WD • AUTOMATIC
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FRANK1949
  • MEMBER
  • 1 POST
What does Service Engine Soon mean and how do I repair it? I have alreaady replaced the O2 sensor on the right side exhaust system.
Aug 19, 2009 at 7:23 PM
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RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
It means you have a problem within the engine management system-pull the code/s by jumping A to B on the DLC and read the flashes


https://images.2carpros.com/forum/automotive_pictures/12900_GM_ALCL_40.jpg

Aug 19, 2009 at 7:33 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.