Question about 2006 Chevrolet Impala
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Posted on Jan 02, 2017
There is no sensor for a loose gas cap. What is happening is that the evaporative emission system is sensing a "Large Leak". Usually code p0455. The computer sees this as the most probable cause is a loose gas cap depending on several factors it looks at. You would need to clear the code(s) and see if that was the problem. If the light comes back on, then you have a problem in the system that will not let it seal. Possible solenoid problem, leaking hose / line, etc.
Posted on May 08, 2009
you may have to reset the engine light. These cars are all computerized. Call the dealership and tell them that you had to replace the gas cap as it was faulty and caused your check engine light to come on. Ask them if they can reset the "computer" or if they can tell you how to do it (if that is possible).
Don't know if that will work, but my dad has been in the car business for over 35 years - I tend to listen to most the things he says......
Posted on Nov 22, 2008
If I'm not mistaken if no other action is taken to turn the light off, there has to be so many start cycles before that history will clear. You could disconnect the battery for a minute or so and that would clear the history.Of course if the problem is still current the light will remain on.
Posted on Nov 22, 2008
On the gas cap itself theres a rubber o-ring.If thats quashed in any way you'll need to replace it.Sometimes takink the o-ring off and putting it back on fixes the problem.Its a very common problem ans is not that expensive to fix..The reason the code keeps coming back is because its a pressurize system and if theres a leak in the system it will throw the light in the dash..
Posted on Mar 30, 2009
I had a check engine light on for my gas cap. I fueled up and sometimes it would say "check gas cap" So i just plugged it in under the steering wheel and cleared the check engine light from my dash board. So far so good.
Posted on Apr 10, 2009
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