sometimes when i am driving either on the highway or around town it doesnt matter my check engine light comes on, but just for 10-20 seconds, then shuts off...is there any way to check the code even while the light isnt on? how do you go about doing so
there's a good write-up somewhere around here that tells you how to do so using a paper clip and a test light. just go to autozone, or advance... they'll do it for free.
When I swapped mid pipes, I must have not seated the O2 sensor correctly. On advice from these boards, I disconnected the battery for 20 mins to erase everything, reseated the sensors, and have not had the problem again.