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P303B Diagnostic Trouble Code Discussion for September 2012

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Trouble Ticket Help Requests for DTC P303B
Help Request Posted
2002 Subaru Impreza WRX 2.0L Misfire, MIL Lamp on VIN: JF1GD29682
... WRX that missfires all the time, especially at idle. The check engine light flashes and the two codes are P303B, and P304. The customer has replaced the spark plugs already with some that he bought at the dealership. They look new. The COP has also been re...
September 27, 2012