Gas Cap - Check Engine Light
Thread Starter
Advanced
Joined: Dec 2006
Posts: 58
Likes: 0
From: San Antonio TX
Gas Cap - Check Engine Light
I've seen something about this before and couldn't find it when trying to search...
I got a check engine light yesterday and AutoZone said it was from a loose gas cap... I had already checked the gas cap and it was as tight as it's going to get. Anyone know what's causing this problem?
I got a check engine light yesterday and AutoZone said it was from a loose gas cap... I had already checked the gas cap and it was as tight as it's going to get. Anyone know what's causing this problem?
Pro
Joined: Dec 2005
Posts: 746
Likes: 0
From: brooksville , fl 34602
Had that issue and called my service advisor from the car. He said most likely picked up some crummy gas; use it and refill and drive somemore and sure enough ; a short time later no more light. That was several thousand miles ago and it never occured again.
Safety Car
Joined: Feb 2007
Posts: 4,684
Likes: 107
From: Opelika Alabama
mine did the same got the notice on the dash then the engine came on and stayed on for two days playing with the cap did no good, dam hard to tell if its on right! filled up put cap on light went off, go figure? get your self a set of helms manuals and a code reader, don't ask some kid at the auto parts store
Instructor
Joined: Jul 2006
Posts: 142
Likes: 0
From: Peoria AZ
this comes from personal experience. Yes, the light may be a fluke, but it could also be a problem. If you made sure you fil up and the gas cap is tight and it doesnt clear the problem in a couple days, then you may have a bigger problem. It seems that the light is detecting any air getting into the system. In my personal experience i had a air leak from a hose around the gas tank somewhere (is what was explained to me). So if you have the problem for more then a couple days take it into the dealer and get them to check it with a handheld monitor they use. I took it in at first they said ignore it, it will go away in a few days you prob put the cap on loose. I took it in a week later with the same problem, they hooked it up and it showed a major air leak in the fuel system. Anyways if you still have the problem, get it checked, its better to be safe then sorry
Instructor
Joined: Oct 2006
Posts: 166
Likes: 0
From: South Elgin IL
I have had a CEL come on for a loose gas cap. When it happened (twice) I also recieved a message on the DIC indicating to replace the gas cap. If you are not seeing this message, my guess is that the CEL may not actually be related to the gas cap.
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Racer
Joined: Feb 2006
Posts: 397
Likes: 1
From: Mountain Top pa
interesting, my gas cap broke and would not tighten and the computer never threw any codes and i drove the car for a couple of days until the new cap was available from the dealer.
i went out and checked the color of the seal, and it is off-white (or at least that is what it looks like to me)
i went out and checked the color of the seal, and it is off-white (or at least that is what it looks like to me)
Team Owner
Joined: Oct 2004
Posts: 27,420
Likes: 64
From: San Clemente CA
interesting, my gas cap broke and would not tighten and the computer never threw any codes and i drove the car for a couple of days until the new cap was available from the dealer.
i went out and checked the color of the seal, and it is off-white (or at least that is what it looks like to me)
i went out and checked the color of the seal, and it is off-white (or at least that is what it looks like to me)
Thread Starter
Advanced
Joined: Dec 2006
Posts: 58
Likes: 0
From: San Antonio TX
Thanks for all of the advice so far!
Here's an update. The light turned on right before i needed to fill up. I filled up the tank and cleared the light at AutoZone. I drove around for about 4 days and a 1/2 tank of gas later, the light is back on....
Dealer time?
Here's an update. The light turned on right before i needed to fill up. I filled up the tank and cleared the light at AutoZone. I drove around for about 4 days and a 1/2 tank of gas later, the light is back on....
Dealer time?
Le Mans Master
Joined: Dec 2002
Posts: 7,588
Likes: 6
From: Montreal Qc
Hope it is not too much of a pain to sort out.
Advanced
Joined: Sep 2003
Posts: 59
Likes: 0
From: Atlanta GA
I've seen something about this before and couldn't find it when trying to search...
I got a check engine light yesterday and AutoZone said it was from a loose gas cap... I had already checked the gas cap and it was as tight as it's going to get. Anyone know what's causing this problem?
I got a check engine light yesterday and AutoZone said it was from a loose gas cap... I had already checked the gas cap and it was as tight as it's going to get. Anyone know what's causing this problem?
Intermediate
Joined: Jun 2007
Posts: 30
Likes: 0
From: KC MO
I'm having the same problem.
It says "Check Gas Cap."
I bought one from Advance Auto Parts, and hit the "Reset" button. The light went off for about a minute. So I bought a GM one, and it went off for about 15 minutes then came back on.
So do you have to get the light cleared by a code reader, or is it something else? It's been on for about a week.
I have about 39k miles on my '05.
It says "Check Gas Cap."
I bought one from Advance Auto Parts, and hit the "Reset" button. The light went off for about a minute. So I bought a GM one, and it went off for about 15 minutes then came back on.
So do you have to get the light cleared by a code reader, or is it something else? It's been on for about a week.
I have about 39k miles on my '05.
Race Director
Joined: Mar 2005
Posts: 11,549
Likes: 27
From: Southampton NJ
I'm having the same problem.
It says "Check Gas Cap."
I bought one from Advance Auto Parts, and hit the "Reset" button. The light went off for about a minute. So I bought a GM one, and it went off for about 15 minutes then came back on.
So do you have to get the light cleared by a code reader, or is it something else? It's been on for about a week.
I have about 39k miles on my '05.
It says "Check Gas Cap."
I bought one from Advance Auto Parts, and hit the "Reset" button. The light went off for about a minute. So I bought a GM one, and it went off for about 15 minutes then came back on.
So do you have to get the light cleared by a code reader, or is it something else? It's been on for about a week.
I have about 39k miles on my '05.
Intermediate
Joined: Jun 2007
Posts: 30
Likes: 0
From: KC MO
I went to the dealer, and they hooked up the tech 2. They couldn't find a code, and yet the "check gas cap" was still on.
He said to come back when his service manager came in, but I didn't go back. I'll go in tomorrow.
He said to come back when his service manager came in, but I didn't go back. I'll go in tomorrow.
