So, I got in a front end collision and after my car being at the shop for over two months I finally got to drive it home last friday. The ABS light and the check engine light were on when I drove it off the lot. The shop is being asses and say there is no way to tell if I brought it in like that or not even though I know it happened after the accident. I checked the codes and they are p0301, p0302, p0303 and p0303. missfires on all cylinders. I cleared the codes and they keep coming back. I have to smog it asap so this is getting very frustrating. please help! the car seems be running fine but I keep throwing codes. : /

 

I too, was in a front end collision in my 03 wrx, i do not have the abs light, but i do have misfire codes in all cylinders. However, my car is running rough at idle, almost like it is cammed. Although it does sound really nasty in a good way, i refuse to drive it because i know this is not right. After looking over it, im curious if i knocked something loose to a vaccum port or line. It has to be something that is directly connected to all four cylinders. I sprayed some carb cleaner around my engine bay, thus trying to detect a leak by the idle surging higher. But, i had no luck. There is a small crack on the plastic cover in the lower front of the drivers side engine. I am curious to know if the missing piece of plastic, somehow went inside, got caught under the belt and sprocket, and jumped my timing. But the only thing that bothers me, is that after the accident, it ran fine, and the next day, i noticed these things. Quite strange, but i will not overlook it. You may have the same problem. And as far as your ABS, im not sure if there is a reset process, i doubt there is, but you could have well damaged a sensor on either of the front wheels. Take it off and inspect! Good luck. Ill let you know what i find with my misfire codes.
03Rextacy