Yesterday, the check engine light came on on my 2000 LHS. Last month I replaced the gas cap when this happened and everything was OK. I checked the gas cap and it was completely closed. I disconnected the battery and the code disappeared until after I drove it to work and it came on this evening on the way home. I have the same code, P0455, EVAP system leak detected. Are there any other obvious places to check for leaks? Somebody recommended that I check the gas filler seal to the gas tank. Any other suggestions?
Thanks in advance, Ron Munroe Falls Ohio