Dennyg2

A few days agoI noticed my gas cap notification, didn't do anything about it initially, only to find that the check engine light then followed. I then tightened my gas tank, but the check engine light remained on for a few hours. Woke up this morning, fired the vette up and the light was gone. Just wondering if anyone else has experienced this to put my mind at ease. My hope is that it is just simply gas cap related.

thanks

category4

Loose gas cap will cause the CEL to come on. Sometimes it takes a day or more for the light to go out.

FortMorganAl

Just a loose cap at this point. If the cap seal is bad the message will return. The federal government is very serious about not wanting to smell any gas when you are driving down the road. You may get a warning but then they give you a CEL that can take days to go away after you fix the problem. Can you imagine the destruction of the earth if they didn't? It's enough to make Ghia cry.

PO10TIAL

You'll be fine, happened on my 07, we eventually had to change the cap it just wouldn't close (seal) properly. I wouldn't worry.

BigDs_C6

If it does need to be replaced, you might want to check with the dealer. Mine shows to be covered for 10 years, 120,000 miles.




D

cobraduke

Just had my gas cap replaced under warranty because it never got tight enough.

EVRose

"Gas cap notification"? Don't think I've ever seen or even read about that one. Is that something new?

talon90

Nope, been on every C6 produced. The system is a closed loop evaporative emissions system. Depending upon the severity of the "leak" in the closed system it will trigger a "Check Gas Cap" message or a Check Engine Light on the instrument panel. If a Check Gas Cap message is ignored, it will progress to a CEL.

PaulB

I have had this happen on several of my Corvettes. I just take it in to the dealer and let them figure it out. Usually, they simply replaced the gas cap...

GOLD72

With my 06Z06 which would throw a gas cap CEL about once a year after a refill, it was my experience that it would take a dozen engine starts to clear the CEL after removing the gas cap and reinstalling correctly by not pushing down on the cap while twisting. Interesting that the OP's CEL turned off so quickly.

Dennyg2

Thanks for the great advice guys. I feel better after hearing this.

foremaw

Just a reminder, when you put the gas cap on do not press down on it, just set it on and turn it until it clicks. Pressing down hard and turning seems to eventually damage these caps. Its not like the caps in the old days.

Dennyg2

Good advice. Thanks!

Wayne O

FWIW...year's ago I got a check gas cap warning. I went to the dealership for a replacement gas cap and they, naturally, wanted to schedule a comprehensive system test. I passed on that and bought a new gas cap from the parts department. Before I installed the new gas cap a forum member suggested I try screwing on my existing gas cap as 'loosely' as possible. The gas cap is still "on" but not screwed down tight like you'd do with gas caps on other cars. I've never seen another check gas cap warning (and I still have the new gas cap in its sealed plastic wrapper). It's possible your gas cap needs replacement but I'd try 'adjusting' how you screw it down before I'd replace it. Good luck.

cadguymark

my experience as well, I passed on it, paid more attention to how I was putting the gas cap on and it never happened again

C6Rolf

Hello From Munich Germany. I have a C6/2005 since 14 months and love this car (before I had a C3/72 and spent more time in the pit than on the road. With the C6 this now has changed).
But since 2 months I got this gas cap warning light problem. I will try the suggested "careful tightening", but I have the feeling that the gas system at the C6 is kind of overengineered.

Rolf from Munich

corvette624

I was told by a reliable Vette tech to just put the cap on the filler neck, do not press down, and turn it until it clicks twice. I have not had a problem since.

eboggs_jkvl

Don't put ANY pressure on the cap to make it "tighter". Just put it on the threads and let the cap pull itself "down" onto the filler neck. After 2 or 3 clicks turn it loose and see if that helps. Apparently the cap doesn't like to be "helped" when it is screwing down on the neck.

Elmer

05_Z51

My cap doesn't tighten up very well. And my light comes on sometimes. I am hoping its just the cap.

While we are on the subject...

When I pump gas into my car, the auto stop on the gas pump always kicks the pump out prematurely. I have to hold the pump at half way to get the fuel in. Otherwise it will just kick out.

Is this normal ?

Hameister

You need to be especially careful about securing your gas cap in Ohio.

You could face a fine of $100.00 per day, up to a maximum of $3,000, for an unsecured gas cap, which could potentially cause catastrophic damage to the environment.

Be thankful you caught it in time!