I have a 2005 Impreza RS Manual Transmission, ~40,000 Miles. During a rain storm 2 weeks ago, the car was running rough and misfiring. I brought it in and 3 of the cylinders were misfiring and they said the oil was extremely low. They suggested a new coil and new wires for $900. My mecha…

Catalytic Converter/ Engine Misfire

skifree09 February 16, 2010, 12:22am 4

First Time the CEL came on Codes:
P0302, P0303, P0304
= Cylinders 2-4 Misfire

Second and Third Time the CEL came on CodesL
P0420
= Catalyst Efficiency Below Threshold (Bank 1)