A Loose or worn gas cap may cause Check Engine Light to illuminate.Google+
Car Problem Reports
Chevrolet Equinox Check Engine Light Due to Gas Cap Issue
Chevrolet Equinox Problem
Average Mileage: 75,361 mi (16,987 mi - 180,000 mi)
Visitor, 2006 Chevrolet Equinox, 68,000 mi
replaced gas cap myself with GM part - cost under $30
Visitor, 2007 Chevrolet Equinox
Gas cap throws on Engine Light....purchased an after market cap, light came back on. Problem resolved with a cap ordered from a Chevy Dealer for the exact year, make and model......light never came back on.
Visitor, 2012 Chevrolet Equinox, 58,000 mi
Received several messages about the gas cap being loose. Tightened it every time. Then the Check Engine light came on due to loose gas cap. Took it to the dealer. They replaced the gas cap. Check Engine light came on again about a week later. Dealer replaced a valve in the fuel system. Picking the car up today, so don't know if that will be a permanent fix or not.
Visitor, 2007 Chevrolet Equinox, 100,000 mi
Engine light coming on and every time we take it to dealer the say is faulty gas cap. Replaced and is ok for about a year and then light comes on and cap is loose and will not tighten. I replaced two since purchasing new in 2007. Is there a better cap I can purchase I have always bought from dealer.
Visitor, 2007 Chevrolet Equinox, 40,000 mi
gas cap not sealing throwing engine lite on
Visitor, 2008 Chevrolet Equinox, 16,987 mi
check engine light came on so we replaced the gas cap and the sensor said we now have a large evap leak
Visitor, 2010 Chevrolet Equinox, 68,100 mi
The light comes on only when it is extremely cold.
Gas cap keeps blowing off, car stalls & engine check light comes on. Have to get out & put cap back on!!! Has happened so many times cap has blown the gas door latch off!!!Getting terrible gas mileage...lost to fumes & vapors!!!
Visitor, 2007 Chevrolet Equinox, 124,000 mi
Check engine light on, gas cap not sealing properly. Had to buy a new cap
Visitor, 2006 Chevrolet Equinox, 134,000 mi
smoke test showed smoke coming from around gas cap