Question about 2005 Buick LaCrosse
The check gas cap light was in response to complaints of the check engine light being on for loose/missing gas caps. So now when the PCM sees a large EVAP leak the first thing it does is illuminate the check gas cap light (on models equipped with the light). Since it doesn't know if the gas cap is on or not it can have other issues like a vent solenoid stuck open which the PCM would be unable to distinguish between that and the gas cap left off.
There will still be a trouble code in the PCM for the EVAP system.
Posted on Oct 05, 2010
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Posted on Jan 02, 2017
An easy fix, if the check engine light is on find an Auto Advance, they can clear the code for you. Any auto parts store may be able to as well, Auto Zone is another one that may be able to help.
Posted on Nov 22, 2008
yes the gas cap could cause this,also check evap. purge solenoid and hoses for cracks or kinks,the solenoid is on the inner fender and has 2 hoses, one to the intake and one to the canister, the most common cause of this code is a defective purge solenoid.
Posted on Apr 24, 2009
yes the light is because of the gas cap being gone (sets code in evaporative emissions system), replace the gas cap, disconnect the battery for five minutes and that will turn of/reset the light, make sure u have the radio code before u do this, if u don't u will have no radio after the battery is disconnected..
Posted on May 08, 2009
Take the car back to your Mechanic and have the mechanic reset your system. Some may advise you to disconnect the battery, and that will reset your computer. This may cause significant problems with your car's computer,radio, alarm. Take the car to the mechanic.
Posted on Aug 17, 2009
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