JDMitchell
Full Access Members
My CEL came on last time I drove my Expedition and it was to late in the day for me to do anything about it so I just parked it in my driveway and left it until today. There was no noticeable loss in power or any other indications of a problem except for the CEL being illuminated. After scanning it, code # P0455 came up, which is Evaporative emission (gross leak). I have done some research and came up with a couple options.
1. Gas cap
2. Evaporative emissions canister purge valve
3. Some sort of vacuum leak (doubtful)
4. (I think this is it) Offroading last week at an extreme angle far enough to have fuel leak out of the fuel cap (pic below) and caused the CEL.
I cleared the code and it has not come back. I will keep my eyes on it for now but I am not very worried about it. If you have this happen to you now you can know where to start. Also if you have had this happen post up with your fix.
1. Gas cap
2. Evaporative emissions canister purge valve
3. Some sort of vacuum leak (doubtful)
4. (I think this is it) Offroading last week at an extreme angle far enough to have fuel leak out of the fuel cap (pic below) and caused the CEL.
I cleared the code and it has not come back. I will keep my eyes on it for now but I am not very worried about it. If you have this happen to you now you can know where to start. Also if you have had this happen post up with your fix.