Question about 2001 Buick LeSabre

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Service engine soon light came on, I took it to get it checked out, they said it was the gas cap not sealing properly, got a new gas cap, the light went out, it has only been a few hours, it is on aga

Is there a reset on these

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There is, unhook the battery let the car set for an hour and re hook it. but i can tell you it will come back on. the reason they told you it was a gas cap is the code told them it was an evap/purge system problem. this is very commonly the gas cap. but in your case it might not be as the light came back on.

Posted on Feb 12, 2012

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SOURCE: "Service engine soon" light

take car to any local parts store and have them check for codes. or a auto repair shop or the dealer. i would take to local parts store cause they will do it for free and give you the codes and tell you what they mean

Posted on Oct 18, 2008

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2 Answers

How to reset Service Engine Soon light after replacing gas cap? Took to AutoZone when the Service Engine Soon light came on Error code P0440.


Disconnect the negative battery cable for 30 minutes. Reconnect after and the code will clear. However if the problem persists, the code will come back with in 20 miles or 30 minutes.

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Did you replace the gas cap? A gas cap that does not seal properly will allow air to be drawn into the evap system and will give you a corresponding check engine light and code. Caps are relatively inexpensive, so buy one and replace your old one.

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this can be caused by a loose gas cap or bad seal on your gas cap - check that first - hope that helps - have a nice day :O)

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Ignoring the light will simply mean that your engine eventually has a breakdown which can be extremely expensive.

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