I know there have been other posts on the check engine light coming on if the gas cap is faulty or not on tight. But mine came on after a fill up and I can not get it to reset,any ideas?

 

Here are a few tips from the OM

If the Light Is On Steady
You also may be able to correct the emission system
malfunction by considering the following:
Did you recently put fuel into your vehicle?
If so, reinstall the fuel cap, making sure to fully
install the cap. See Filling the Tank on page 5-7.
The diagnostic system can determine if the fuel cap has
been left off or improperly installed. A loose or missing
fuel cap will allow fuel to evaporate into the atmosphere.
A few driving trips with the cap properly installed
should turn the light off.
Did you just drive through a deep puddle of water?
If so, your electrical system may be wet. The condition
will usually be corrected when the electrical system
dries out. A few driving trips should turn the light off.

Have you recently changed brands of fuel?
If so, be sure to fuel your vehicle with quality fuel.
See Gasoline Octane on page 5-5. Poor fuel quality will
cause your engine not to run as efficiently as designed.
You may notice this as stalling after start-up, stalling
when you put the vehicle into gear, misfiring, hesitation
on acceleration, or stumbling on acceleration. (These
conditions may go away once the engine is warmed up.)
This will be detected by the system and cause the
light to turn on.
If you experience one or more of these conditions,
change the fuel brand you use. It will require at least
one full tank of the proper fuel to turn the light off.
If none of the above steps have made the light turn
off, your dealer can check the vehicle. Your dealer
has the proper test equipment and diagnostic tools to fix
any mechanical or electrical problems that may have
developed.

 

Thanks, I did just put fuel in and I made sure the cap was on tight but maybe I need to take a few more trips because its still on!

 

Maybe you should stop guessing and have someone scan it for DTc's?Is the car under warranty?I do not understand people who come online to have people try and guess why their check engine light is on.Just bring it in if it is under warranty.

 

We post on this forum to trade helpfull information!! If you have nothing helpfull to post THEN DON,T POST AT ALL!!!

 

Have them clear the code.

 

According to my C6 manual, the DIC will show a message "CHECK GAS CAP" if the cap is loose. My uneducated guess is if you haven't seen this message, your cap wasn't detected as being loose.

 

Do you have OnStar? Many times they can run diagnostics and let you know what the light is on for if you can't get it to the dealer right now.

 

There are many more serious reasons for the CEL coming on than a faulty gas cap. While faulty gas caps are a frequent problem, you generally get a DIC message as someone said. It is most likely NOT the gas cap.

Take it to the dealer and let them check it out.

Edit: If the problem corrects itself, the code and the CEL will reset two start cycles after the problem goes away. If the CEL stays on, you have a continuing problem. If you don't won't to take the car to the dealer, the only way know this problem for certain is to buy yourself an OBDII code reader and the Helm service manual, and do your homework. You may end up having to take the car to the dealer anyway.

 

I get the "Shift to Park" message but dealer cannot find any codes on this. It doesn't act up when I see dealership (2 times) it is always afterwards it does this. This car must have a mind of its own.
Just had the gas cap cleared in computer and new gas cap replaced.

 

Not all dealers are good at solving C6 problems without causing others. I've got a pretty good local small dealer, but I'd still rather fix it myself if it's something easily fixed by someone with absolutely no mechanical ability at all.

This sort of thing is why the Corvette Forum has so many members.

Lighten up.

 

Some things are so elementary, you aren't going to get any codes. I'm surprised your dealer can't guess the cause...maybe he isn't trying very hard.

Inside the console, there will be a little switch that tells the computer when the shift lever is in Park...that switch has either loosened up or needs to be adjusted so that the shift mechanism closes the switch in the Park position.

 

A mechanical problem/connection.

 

I had check engine light problem. The codes just say something like leak in evaporation system - same as loose gas cap. Turned out mine was a broken end of the pipe that connects the two gas tanks. Took a good dealer with good diagnostics techniques to find it (second dealer, first just treated me like an idiot). Hope yours isn't that tough but it can mean more that loose gas cap.

 

Just a loose cap as far as everything goes at this point. The "Shift to Park" thing comes and goes and has been the longest irritant so far.

 

I would rather attempt to solve the problem, with the help of the educated members on this forum, before taking the car into the idiots at the dealership. Especially if it's a simple issue to check out. I know that there are those on this forum that can't change a light bulb (no bash, my Dad was like that) but it's far easier and convenient to check things before the trip to the dealer. Just my $0.02. Good luck.

 

Much more convenient as you don't have to pick a number in line.

 

Idiots at the dealer?Sure maybe at some dealers,but not everyone at the dealer is an idiot.That is like making a statement that all Corvette owners are **** cry babies who come online to cry about their cars.And unless this guy has some sort of scan tool,how is he gonna find out why his check engine light is on?

 

mine came on for the first time after 47K miles. Was returning from Mt Whitney at high altitude, light went out after a couple of restarts. Took to dealer to see if any codes were left behind. Was a new one to them they had to go to tech to find out. High voltage and fuel delivery error or something close to what I remember. Attributed to the fueling at 7000 ft and blasting to sea level in a hurry.

 

If there is any issue with the emission system the light will go off...you need a ODBII scan tool to point to the problem. Either you get yourself one or you bring it to the dealer. This is likely be a straightforward diagnostic