jeepaholic Posted February 25, 2009 Share Posted February 25, 2009 My wife's cherokee has apparently had the check engine light coming on and off for some time now..(didnt tell me)..It has never come on while i was driving but then again i hardly ever do drive it..anyway it came on when she went to get emissions...what would cause the light to come on and off periodically..only thing comes to mind is the gas cap. Link to comment Share on other sites More sharing options...
Eagle Posted February 25, 2009 Share Posted February 25, 2009 My wife's 2000 XJ had that problem and it was the gas cap. Dealer gets about $25 for a new cap, and they don't sell the O-ring as a separate part. I took off the O-ring, sprayed it with silicone spray and worked it into the rubber as best I could, and put it back. Haven't had a light for six months. Link to comment Share on other sites More sharing options...
dasbulliwagen Posted February 25, 2009 Share Posted February 25, 2009 WJs are known for their evap hoses going bad behind the left rear wheel at the canister. If it is a small leak it could come and go like you say, or it could be an O2 sensor like the one I replaced yesterday on an 04 WJ 4.0. Take it to your local national auto parts chain store and have them read the code for you for free. At least youll know where to look then. Link to comment Share on other sites More sharing options...
87Warrior Posted February 25, 2009 Share Posted February 25, 2009 Pull the code and see what it is. Key on, off, on, off, on code is displayed in the odometer. My rubi throws 02 sensor codes when it in near zero degrees outside every other week. I'll get around to fixing it sometime.... Link to comment Share on other sites More sharing options...
Silver88 Posted February 25, 2009 Share Posted February 25, 2009 My wife's 2000 XJ had that problem and it was the gas cap. Dealer gets about $25 for a new cap, and they don't sell the O-ring as a separate part. I took off the O-ring, sprayed it with silicone spray and worked it into the rubber as best I could, and put it back. Haven't had a light for six months. :agree: Same thing happened on our 01. Link to comment Share on other sites More sharing options...
aemsee Posted February 25, 2009 Share Posted February 25, 2009 The list is a very long one. Don't throw parts at it. See what the code is. Link to comment Share on other sites More sharing options...
Eagle Posted February 26, 2009 Share Posted February 26, 2009 The list is a very long one. Don't throw parts at it. See what the code is. Good point. I forgot to mention that I pulled the code in order to zero in on the gas cap. However, a shot of silicone spray on the O-ring won't break the bank. Link to comment Share on other sites More sharing options...
Eagle Posted February 26, 2009 Share Posted February 26, 2009 The list is a very long one. Don't throw parts at it. See what the code is. Good point. I forgot to mention that I pulled the code in order to zero in on the gas cap. However, a shot of silicone spray on the O-ring won't break the bank. I also went on-line and found a place where I could buy the appropriate size O-rings, in a fuel-resistant rubber compound, for about 50 cents each in 5-packs. So I now have them for if/when I need them. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now