View Full Version : P0301, P0302 then P0300

01-14-2008, 05:02 PM
01 a4 1.8t qmtrans (stock except for after market cat.)
Today noticed my car started missing twice for about 2 seconds each with about a 5 second gap between them. Then normal running for about 5 minutes. Car then started missing again. Pulled over and checked for codes. Had a p0301 code (cyl 1 misfire). I swichted cyl 1 and 2 coils, cleared code and started again and got a p0302 code (cyl 2 misfire). thought for sure that it was the original #1 cyl coil. But then I after clearing code and starting again I got a p0300 (random misfire). Do you guys think that the coil would be a fix or would this be something else. Codes read and cleared on standard obd2 code reader, I don't have a vag. Thanks for any and all guidance in advance!

Fier Ringe
01-15-2008, 01:31 PM
P0300 just states that there is a misfire, it doesn't designate a specific cylinder, then you will also get codes for each specific cylinder that is misfiring. If your misfire truly did follow the coil then that is your problem. You can get them for $30-$35 each from Avalon IIRC. Talk to Brian, he is very helpful. 303-400-3001. I would recommend doing all four as they fail all the time. They have the latest updated part 06B-905-115-R. You probably have J's or L's in your car.

01-15-2008, 01:50 PM
if you have the money change them all, if not make sure you keep and extra in your car in case another goes out. also check your spark plugs if you havent changed them in a while

01-15-2008, 03:05 PM
could be a maf sensor

Fier Ringe
01-15-2008, 03:38 PM
could be a maf sensor

It could be alot of things, but if it is a maf then why did the misfire follow the coil? Lets use some logic here instead of just throwing out random suggestions.

01-23-2008, 02:31 PM
Thanks for the input. It was my #1 cyl. coil. I went ahead and changed all four. I'll keep the other three as back-ups.

Fier Ringe
01-23-2008, 03:51 PM
Cool. Never trust a coil or a maf on any audi.