2006 Buick Rainier Check Engine Light Due to Gas Cap Issue

A loose or worn gas cap may cause check engine light to illuminate.

Affected Model Years

This issue affects Buick Rainier model years 2004, 2005, 2006, 2007, .

37 people reported this problem

  • 2006 36,000 Miles
    My light comes on and I make sure the cap is secure and it is --I wonder why the light keeps coming on

  • 2006 125,000 Miles
    Check engine light on. Can the gas cap be repaired?

  • 2006 15,000 Miles
    Have had cap replaced at least three times since we purchased auto. Started around 15,000. Dealership closed and any recalls, we are told need to go to a GM dealer or not covered even if other shops were certified through GM

  • 2006 120,000 Miles
    Bought a new gas cap

  • 2006 38,000 Miles
    removed gas cap and reinstalled. After a tank of gas the light went off. It has occurred twice with same result.

  • 2006 85,000 Miles
    A Toy Story Sticker solved this one for me. I stuck it right over the indicator light!! THe darn thing comes on EVERY time that I am almost empty. As soon as I fill up, it may go off, it may not. Sometimes I only have to turn the car off, go outside and screw the cap on again. It's not a very smart car.

  • 2006 88,700 Miles
    Gas cap no longer latches causing the check engine light to illuminate.

  • 2006 160,000 Miles
    Check Engine light alone, Tighten Gas Cap message alone, or Check Engine light and Tighten Gas Cap message together appear on dash and go away by themselves. Gas cap is tight.

  • 2006 87,000 Miles
    Check engine light came on went and had it diagnose. The code indicated leak in the emission or gas cap. Went and bought a gas cap from dealer, check engine light never went off.Took it to have it check out after buying gas cap. The shop claim they couldn't find any thing wrong. The shop reset the system, check engine light went off. Two weeks later it came back on. Had it dianose again. Finding that it a leak in the emission reserved tank. Which is leaking gas from one of the hose in side the tank. Wow what danger.

  • 2006 50,000 Miles
    The light came on signalling a Gas Cap issue. I bought a new one at the dealership where I bought the car new, and we still have the problem.

  • 2006 100,000 Miles
    Every year code p0455 comes out large leak on evaporation system change the cap one time work but now a message come out in the dash board saying loose cap

  • 2006 94,341 Miles
    light comes on ck gas cap have bought three new gas caps from buick dealership and yet still have the same problem

  • 2006 0 Miles
    Light just pop on checked gas cap don't are any problem with gas cap

  • 2006 95,000 Miles
    Check engine light comes on frequently due to gas cap :(