Fuel gauge malfunction

Tiny
SGUTIE435
  • MEMBER
  • 2005 CHEVROLET COBALT
  • 4 CYL
  • AUTOMATIC
  • 89,467 MILES
I just purchased this car used from a personal seller and my first fill up about 3 days ago my gas gage was acting up. When I would turn my car off for a few minutes my gas gauge would go from full to a quarter of a tank. Even where it tells u how many miles u have till empty it went from like 196 to 160 so both are messing up. When I start driving again it will go back up slowly. I just had my o2 sensor changed and even put a fuel treatment in before I filled. Im Still having the issue. Can u help?
Friday, April 15th, 2016 AT 7:41 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Have the dash checked to see if it's bad a they are digital and can do that, but can be rebuilt, then check for a bare spot to sender causing it to do what you are saying. It's a pink/org wire it also may be a pcm problem but would require scanning by a pro.
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Friday, April 15th, 2016 AT 10:16 AM

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