Hi guys..

Sorry to keep making new posts but i cant seem to find this problem.

P0455 Evaporative emission system leak detected (Large Leak)..

This is the second time in the past month or so that its come on and i just clear it and it dose not come on for a long time.. What does it mean? and it seems like it to me that it eats more gas when it comes on.

 

You probably need a new gas cap, or the gas cap in not on properly. Evap is a closed system that sucks fumes out of the gas tank and into the engine instead of releasing them into the air. If there is a leak in the system it throws a DTC, the most common suspect is the gas cap.

 

And if it not the gas cap what els could it be?

 

Anything within the evap system that could be broken or cracked. There will be a hose that runs from the tank to the charcoal canister and a purge valve that is connected to the intake. As soon as the system loses vacuum it will trip the code.

 

ok thanks for the info

 

Same issue here. Light came on the day after I got the car, took it to autozone, code p0455.

Next day, after filling up the tank, engine had trouble staying running. after a few tries, it worked fine.

This was two days ago, and today, my gas gauge indicated I still had 1/4 tank of gas, but car stalled and didn't start until I added gas.

Is this related to the Evap system leak?

Could my gas meter gauge be bad?

I have scheduled to have the dealer's service department look at it on friday.

Is it safe to drive the car until then or should I park it until its fixed?

 

replace the n80 valve.
I did that last month and it went away.
I did a smoke test as well but nothing came up

 

Thank you, I will try that this week.

 

So I replaced the N80 valve yesterday, and took it for a fill up.

Started up perfectly, no fluttering or stalling, Im a happy camper...


Today, I was sitting in a drive through line for like 20 minutes and my car died.

engine fluttering again, wouldn't start.

I had a full tank, so it couldn't be the gas like last time, so I thought, let me shake the fuel tank... Shook the car around and voila! car started.


Thoughts....?

 

I suggest to do a smoke test.. It will indicate if the vacuum lines or cani
ster has any leak or blockage