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2007 Buick LaCrosse Question: Why does the check engine light stay on after replacing the gas cap?

 

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Cocheese, New London, WI, September 20, 2011, 19:06
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The gas cap indicator came on frequently. Then the check engine light came on. There was an emission issue code, so I cleared the error and replaced the gas cap. It happened again the next day. Gas cap indicator until eventually the check engine light came on again. What's the issue. I've been told it is a simple system and it's probably a loose hose. What's my next step? I really don't have the money to take it into a shop.

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  • Answer #1

    September 20, 2011, 19:38
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     Master

    it is not a simple system. it is complicated. you have a large leak in the evap system and you need a shop with a smoke machine and a scanner. do not clear the code as the tech will need to see the saved freeze frame data to help with the diag.

    Roy

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  • Medium-star Best Answer
    September 20, 2011, 20:25
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     Journeyman

    you need to check out the code first, then you can narrow the car problem, you can go to the auto zone, they check for free.

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