p0301 and p0302 cylinders 1 and 2 misfiring,
when I got two new ones the code was only reading one cylinder misfiring so my mechanic changed it and it cleared he said when it came on again we would change the other. I moved away I still have the 2nd cylinder but now it is reading cylinder 1 and 2 again. Can the cylinder break that quick? Should I get another one and replace both? It is also saying p0420 catalyst system efficiency below threshold bank 1. Can the misfiring ciylinders cause this to come up?
have the same problem?
Tuesday, July 7th, 2009 AT 12:15 PM