Check Engine Light Due to Gas Cap Issue on Chevrolet Impala

A Loose or worn gas cap may cause Check Engine Light to illuminate.

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Average mileage: 91,268 (23,000–200,000)
12 model years affected: 2002, 2003, 2004, 2005, more2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
151 people reported this problem
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Viewing 1 - 20 of 62 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.
Check engine light is on. It says check gas cap, However gas cap is tight.
Check engine light illuminated due to gas cap issue. Replaced cap. Check engine light still on
reports gas cap, replaced but keeps repeating. paying 100 dollars each time for poor service. weather, raining it comes back. Three gas caps later it still comes back? Help.
Engine light comes on, reads large emissions leak, replaced gas cap.
2006 Chevrolet Impala 114,000 mi,
Replaced gas cap; still have problem.
2013 Chevrolet Impala 37,000 mi,
loose gas cap keeps causing check engine light
Clean off the inside of the gas cap with WD40. After I got all of this dirt out, the "Tighten Gas Cap" error never came back up. Air must have been getting into the system and reducing the vacuum pressure for the gas going to the engine.
2006 Chevrolet Impala 110,000 mi,
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.
2011 Chevrolet Impala 23,000 mi,
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!
2008 Chevrolet Impala 100,000 mi,
Not fixed. Per code it my gas cap. Replaced it but problem continues. Normally I wouldn't care but because of this I cannot use my auto start
2008 Chevrolet Impala 100,000 mi,
engine light came one whenever I got gas, replaced cap and it was fine for two years, now it has started again.
2010 Chevrolet Impala 54,000 mi,
check engine light came on due to faulty gas cap.
2006 Chevrolet Impala 97,500 mi,
engine light on; replaced of many issues with this car...
2011 Chevrolet Impala 58,000 mi,
Same issue, same story, paid for the most expensive gas cap they could find!
2010 Chevrolet Impala 51,247 mi,
engine light came on . we took the car to have it checked and were told the gas cap was faulty! REALLY?
2006 Chevrolet Impala 131,000 mi,
had to buy a gas cap from chevy dealership because of tighten gas cap indication
have replaced the gas cap 3 x at different intervals so far.
2010 Chevrolet Impala 76,500 mi,
2010 Chevy Impala engine light came on, I took it to my mechanic and he put it on the diagnostic machine, turned out it was a loose gas cap. Usually it tells me when the cap is loose or off. This was a first that the Check engine light came on.
Engine light on from gas cap. Tighten cap, it will go off after a few weeks. But come on again periodically