Question folks. Yesterday afternoon I was driving home from work in a heavy snowy weather (very rare in Dallas) and suddenly at a stop light the "service engine soon" light came on. So I'm thinking "OK here we go". So naturally I check the fuel cap (twice) to make sure it's tightly sealed and the light is still on. I took it to Auto Zone and they gave me the code P0455. I've had my MD spacer and a Popchager without any issues in the past. I'm thinking about taking it to Cobb Tuning near by my area to have them look at it. But in the mean time do you guys have any advice?

 

Reset ECU and drive for a few days to see if the light comes back on

 

This thread needs to be moved. Sorry I just realized this is posted in a wrong area.

 

P0455, Evaporative System Leak - Large

 

Well this morning I reset my car and the light is gone. Hopefully it'll stay that way, otherwise I'll post more updates.

 

How miles have you driven since the reset? Light come back yet?

 

this exact thing happened to me up in mckinney, lmk what you find out, hopefully it stays off.

 

Not much. I'd say about 70 miles. The light is still off though so I guess we'll see in time.

 

I know it's been nearly 2 years since my last post but I just thought I'd update this if anyone else ever run into same issue.
Turns out the OEM Evap Canister had a hole on it that cause the engine light to turn on when driven for long time (an hour or more). Probably drove over something and bounced right into it The part itself is basically a black box and if I remember correctly it is located below (or behind?) the rear passenger signal lights.

 

I had the same thing happen with my car. However, my problem was the canister purge control valve. I just replaced that and no more problems. And yes, it is located under the passenger rear. It was a pain in the butt to get to for sure though.