Gas Cap Deception A Check Engine Light's Sly Accomplice

I've had a weird intermittent check engine/VSC light problem. I've noticed that it comes after getting gas and sometimes goes away after getting gas. The gas cap will make the check engine light go on. Same thing happened to me once. I cleaned the gasket on the cap and cranked it down really ... A gas cap can cause a check engine light? Sounds like one of those superstitions or myths, doesn't it? But it's true! A gas cap with a loose ... The cap check light comes on when there is air leak somewhere in your system - it might be tank or cap or something else. While in Ouray I started the truck up and started driving, check engine light came on and truck drove like there was engine problems. truck ... If the check engine light was caused by a loose gas cap, it usually turns off after tightening it and then driving your car for several minutes. It is the most common of about 100 reasons as to why the Check Engine light comes on. Always make sure you twist till it clicks. The gas cap light came on. Checked, and it was well secured. Now the check engine light is on. Did some internet searches and not sure there is a clear cause ... A gas cap that is not tight can cause the fuel system to leak, triggering the check engine light. At Fort Collins Muffler & Automotive, we can ... If it detects a loss of pressure in its cycle, the CEL to come on. No biggie, just get a new gas cap. Drive around with it and if it doesn't set ...