Faulty gas cap?


#1

I just bought a 1998 Jeep Cherokee sport with the I6 4.0L engine. 5-speed manual transmission. The day I bought the vehicle, there was no check engine light on or anything but 2 days after I got it the check engine light came on when I started the vehicle in the morning. Got out my scan tool and got it to read P0443. Had to do with evaporative, cant remember the whole thing. Anyway, i thought maybe it was the gas cap since I had just put gas in the night before so I took the cap off and tightened it back up, letting it click a good 5-8 times. Cleared the codes, let the vehicle run for a few minutes to be sure it wasnt going to come back on, shut it off for a minute, turned it back on and the light came back on and has been on ever since. I really cant seem to find any vacuum leaks anywhere or hear any that may be leaking. Do you think it would be a smart choice to buy a new gas cap to see if it takes care of the problem or is there something else I should consider doing? And before someone says to try tightening it again to see what happens, I have done it several times just to be sure. Thanks in advance!


#2

thats a purge code. fuel cap has zero to do with that


#3

The code P0443 is, “Evaporative emissions system purge control valve circuit”. Click on this link for info on the evaporative canister purge solenoid: http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800a9ba2 Scroll down about three “pages”.
Your public library probably has a subscription to www.alldata.com. You can go to that Website and get the troubleshooting charts for that DTC code. You’ll need to use a multimeter, too, and the wiring diagrams.