Check Engine Light Due to Gas Cap Issue on Chevrolet Impala

Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

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Average mileage: 87,971 (23,000–165,000)
9 model years affected: 2003, 2004, 2006, 2007, more2008, 2009, 2010, 2011, 2013
66 people reported this problem
29 people shared problem details
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.
34 people like thisFlag inappropiate
Engine light comes on, reads large emissions leak, replaced gas cap.
10 people like thisFlag inappropiate
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!
8 people like thisFlag inappropiate
2006 Chevrolet Impala110,000
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.
7 people like thisFlag inappropiate
Check engine light is on. It says check gas cap, However gas cap is tight.
7 people like thisFlag inappropiate
Same issue, same story, paid for the most expensive gas cap they could find!
4 people like thisFlag inappropiate
2006 Chevrolet Impala114,000
Replaced gas cap; still have problem.
4 people like thisFlag inappropiate
engine light on; replaced gascap...one of many issues with this car...
4 people like thisFlag inappropiate
2008 Chevrolet Impala100,000
engine light came one whenever I got gas, replaced cap and it was fine for two years, now it has started again.
3 people like thisFlag inappropiate
2006 Chevrolet Impala131,000
had to buy a gas cap from chevy dealership because of tighten gas cap indication
3 people like thisFlag inappropiate
loose gas cap keeps causing check engine light
1 person likes thisFlag inappropiate
2008 Chevrolet Impala135,000
CHECK ENGINE LIGHT CAME ON CODE WAS P10445 LARGE EMISSION LEAK; REPLACED GAS CAP- HAD CODE CLEARED DROVE @ 150 MILES AND THE SAME ISSUE.
I've replaced my gas cap because it was worn and easy to just pull off when tightened. Even though I've replaced it it still shows "tighten gas cap" when driving and I know I have it on tightly.
2008 Chevrolet Impala120,000
i have the same problem with this 2008 chevy impala and i dont know how i can fix it
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.
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.
2010 Chevrolet Impala136,000
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.
Seem to go through a fuel cap every year and a half
2006 Chevrolet Impala105,000
got message "tighten gas cap" & engine light came on. Replaced cap. No good. Cannot resolve
check ingine light on
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