Check Engine Light Due to Gas Cap Issue on Chevrolet Equinox

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

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Average mileage: 73,237 (15,000–180,000)
9 model years affected: 2005, 2006, 2007, 2008, more2009, 2010, 2011, 2012, 2013
65 people reported this problem
33 people shared problem details
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.
Found cheap I bought it . Shortly after using only this gas the check engine light came on.switched back to my regular gas and tightened the gas cap...went away.comes on usually after I get gas. I changed caps but the new one would not seat properly so the light came on again. I took back the new cap, and used the, older one but cleaned it we'll along with the port. The light went off and has stayed off. I had AutoZone scan the OBD... and it stated there was a large leak. Gas cap was the first reason!!!!!. I will never buy another chevy... they cannot seem to engineer cars the way they used to. All of the problems we have had are related to miss poor design and engineering. The ignition(470.00),CD player,Windows won't go down or up, ac works when it wants,the list goes on and on. I take care r e and change my own oil I have to remove engine parts to change the plugs???. The brake sensors are shot also, Nd, this is a known problem. Instead of waiting for class action litigation, maybe chevy or GM should do the right thing and just take care of the problems instead of denying all the posts about common issues COMMON PEOPLE have.
It all started about 8 months ago. I felt a pulsating when backing out of my driveway first thing in the morning. This is the only time it would happen. I thought it was a break problem. Took it to my mechanic. Tests showed misfire in once cylinder but only on initial start up in morning. Chevy's suggested fix - replace EGR valve, plugs and wires. It was ok for about a week and started again. Next suggestion from Chevy - replace O2 sensors. Ran ok again for a couple of weeks and started again. This time ran a valve cleaner through and a smoke check for leaks. No leaks found. Still misfiring. 2 more valve cleaners run through. Was ok for about 3 months. Started misfiring again and now check engine light is on. Still waiting for diagnosis. Since Chevy knows this is a problem, why isn't there any recalls? My idea is because they don't know how to fix their poor design.
The light comes on only when it is extremely cold.
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.
replaced gas cap myself with GM part - cost under $30
All of a sudden the engine light is on. Everything works fine, no engine or other mechanical problem.
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.
gas cap not sealing throwing engine lite on
I have owned my equinox for 1 month have a had my check gas cap message come on twice since i have owned yesterday being one of the times and today my check engine light is on I had onstar run a diagnostic test and stated it was something with the emissions. Has anyone had this problem? Im calling the dealership tomorrow, I hope whatever it is covered in my warranty.
Check engine light appeared
My battery was dead. I had the battery jumped. The Engine light was on and the transmission would barely move the car. I called the Chev Service but he said he couldn't work on it for two or three days. I had not bought Gas lately but I decided to check the Gas Cap. It was loose. After I tightened It the Check engine light went out and my transmission was back to full power. I don't understand the connection but It was all a loose Gas Cap.
I have had what I consider to be major work done to my Sport over the last year. Timing chains, Tensioners, Catalytic, Shifter assy, and now most recently Gas cap vapor sensor. 2 weeks after completing the later, I now have "hot engine, A/C off" and the check engine light, on AGAIN!!! Cooling fan runs constant, and after turning off, yet temp gauge does not move. I do not know if there is now another "sensor" gone bad, and another $300 needs be shelled out, or if I have to replace yet another thermostat. Yes, not my first.
Three months ago I had to replace my A/C compressor, and now it's the Check Engine Light at 31,000 miles!
did the whole gas cap replace ok for a day now back on
The Check Engine Light came on flashing. Car started missing.Found out there is a Bulletin # 10250 that covers faulty Spark Plug Wire ---Warranty Extension. Its good for 10 years or 120,000 miles. The dealer is supposed to replace all spark plug wires and if necessary the spark plug. I got the info from Alldata. I've taken it in 4 times so far. My dealership only replaces one wire at a time. So---6 cylinders -- 2 more times left to go. Again - its Bulletin #10250
check engine light stays on. Had gas put in car forgot to put gas cap back on. Replaced cap and check engine light stays on now.
Early in the morning the check engine light came on on the dash and right after a message popped up on the dash indicating the Gas cap needed to be tightened
My check engine light came on and said tighten gas cap. I tried to tighten it but it was tight. I bought a new cap but still the same problem. Now my fuel pump failed and I have to pay $527 for a new one.
One week (1/30/15) after purchasing vehicle, the check engine light came on. On 3/15/15, the dealer cleared the check engine light and I replaced the gas cap, three hours later while traveling out of town, the check light came on again. Problem not solved!
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