I have a 1999 Jeep Cherokee with 4.0L engine. The Check Engine light illuminates with associated codes of either P0422 and P0455 - Evap Control System Small/Large Leak (usually P0455). I've erased these codes several time and light goes away but will come back within a couple days (usually within 50 driving miles).
7154 posts · Joined 2012. #3 · Dec 15, 2015. I had similar codes on my DD car. Initially, they replaced the fuel tank because of the same reason that yours was replaced. That cost me over $1,100 two years ago. Fortunately, the dealer I use has a "Fixed for Life" guarantee, where if the same problem ever happens again I only have to pay for
2002 G Cherokee 4.7L Codes are P0340,P0135,PO740,P0455 and says control system, leak defected? Also posted earlier - Jeep Grand Cherokee question
hf2a.