Buick Lucerne Problem Report
Buick Lucerne Check Engine Light Due to Gas Cap Issue
A Loose or worn gas cap may cause Check Engine Light to illuminate.
check engine light came on and stays on and yet the dealer can't find anything wrong. - candmgoss
On a trip to Florida week of 22 Nov 10, after fillup the message "tighten Gas Cap" kept coming up. I tightened it and then it went away until the next fillup. This week, I have the Check Engin Light on and then sometimes it will come up with the "Tighten Gas Cap", but the check engine light still stays on. I am on the 3rd gas cap. Two from Buick and 1 from Avanced Auto. Now I am told that I need to run the car 7 times to get rid of the check engine light. - Visitor
Check gas cap came on occasionally. Replaced gas cap and problem returned. I replaced the purge control valve (ac-delco part 214-1473,reset the computer and the problem has been fixed. The purge valve was not sealing when "closed" which would be similar to a bad gas cap. - Visitor
Car – light indicator states to tighten gas cap. The gas cap can't be tightened any further therefore the light is still on and I don't know what problems will come out of this is not repaired - Visitor
Check engine light illuminates after refueling, can correct bt playing with the gas cap. Takes a few miles (or starts) before the light goes out. - Visitor
I have to reset gas cap when engine light comes on - which causes the engine light to go off. - Visitor
Engine light, tighten gas cap. - bp854
engine light comes on ..checked the gas cap is very loose..will not tighten - Visitor
First i got a "tighten gas cap" error message then after about a week i started getting check engine - peloton
checked gas cap , retightened it with no results, later (150) miles the light went away upon starting the engine. - Visitor
When this light comes on after ti has been found to not be a problem and the gas cap is ok what...
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