Chevrolet Impala Problem Report
Chevrolet Impala Check Engine Light Due to Gas Cap Issue
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
I kept getting the check engine light and tighten gas cap. Paid dealership (almost $200 including labor) for a new gas cap. Now almost a year later getting same check engine light and tighten gas cap. This time they're saying I need to replace evap vent solenoid for $130. It seems like a lot of the issues with this car are the same. GM should step up and solve them. - april1105
Engine light comes on, reads large emissions leak, replaced gas cap. - 1978reynolds
3rd time in 7 months the check engine light came on and dealer keeps telling me the gas cap isn't on tight enough. i'm soooo sorry i bought this car! - Visitor
Same issue, worn gas cap allowing air in the tank and check engine light. Bought a new cap and fixed the issue. 50,000 miles later still no re-occurrence. - Visitor
Check engine light is on. It says check gas cap, However gas cap is tight. - Visitor
Same issue, same story, paid for the most expensive gas cap they could find! - Visitor
Replaced gas cap; still have problem. - Visitor
engine light came one whenever I got gas, replaced cap and it was fine for two years, now it has started again. - Visitor
had to buy a gas cap from chevy dealership because of tighten gas cap indication - Visitor
engine light on; replaced gascap...one of many issues with this car... - Visitor
Tighten Gas Cap message came up last week...hadn't filled up in about 4 days. Cap was tight but I took it off and put it back on and the message cleared. 3 days ago the check engine light came on. I went to Advance Auto and they ran a free scan, everything was fine except the fuel evap fault. They told me to tighten the cap and if it doesn't clear in a few days, replace the cap. I have a cap on order from Amazon for $14.49, hopefully it will resolve. I can't complain, this is the first problem we have had since buying the car new in June of '09. It's been a great car with lots of power and speed, very sure footed in the snow. It's paid off so I hope to have the car for another year before getting rid of it. - Visitor
I've had it resets ever all times & 2 new gas caps since. Problem keeps recirring. The ogget problem is you won't know I'd you Jane a real issue if the check enginE light is always on. - Visitor
My check engine light came on a few days after I had an oil change.I took it back to the shop to have it checked and the service man stated that my gas cap was loose/or needed replacing. I bought a new gas cap from local advanced auto store, he turned the engine light off, but stated that it would probably come on again. I had it rechecked at another auto service center, with similar results-gas cap needs to be tightened. I've been driving it about 3 months with the light on. - Visitor
Seem to go through a fuel cap every year and a half - Visitor
got message "tighten gas cap" & engine light came on. Replaced cap. No good. Cannot resolve - Visitor
check ingine light on - Visitor
Same problem - Visitor
Same issue. Gas cap light comes on. Replaced gas cap and was good for a couple of months. Now it's on again. - poorgirl2
The dash board instructs to tighten the gas cap. Then the check engine light comes on. - Visitor
Evaporative emission control system vent valve - Visitor
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