PROBLEMS AFTER NEW FUEL PUMPS INSTALLED/GAS CAP ICON ON DASH

Tiny
HOOKIE
  • MEMBER
  • 2008 BMW 328
  • 3.0L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
Do u know why my gas cap light displays on dash then shuts of and throws a CODE (CHECK ENGINE LIGHT) I intsalled a brand new cap still doing same thing
Sunday, August 3rd, 2025 AT 7:07 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Yes, this means there is a leak in the EVAP system. Usually it will be the vacuum line or the canister is leaking itself. You can use a smoke machine to help find it. Please go over this video to see what I am talking about, the machine has an adapter to fit onto the gas fill tube.

https://www.youtube.com/watch?v=LRKWV4Are5c&t

I have also seen the O ring at the 90 degree elbow leak, here is the location of both so you can check it out. Check out the images (below). Please let us know what happens.
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Monday, August 4th, 2025 AT 1:35 PM

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