Codee P0455 (Large Evap. System Leak)
For the last week and a half I've had a "Service Engine Soon" light come on and off. It was on when I was driving out of town for 4 days and then when I got home and was about to take it in, it went off... for another 4 days... then yesterday it came back on. I had the code pulled and it came back as P0455, Evaporative System Leak - Large. I have no idea where to begin diagnosing this. What hoses should I check, what should I look for and where is the canister? From what I found it seems that the problem is usually there or the gas cap. Is there anything simple to check or process of following some lines to get to the cause of this? I checked the gas cap and it seemed tight, but I also put some fuel system cleaner in the car, and made sure that the cap was replaced tightly. The code was turned off when it was pulled, and it hasn't yet come back, but I need to know what to look for if/when it does come back.
Thanks in advance
2004 Sentra 1.8s with 39,000 miles FYI
Last edited by slhaas; Jun 3rd, 2006 at 07:42 PM.