Mechanics

MERCEDES BENZ C230 SENSOR PROBLEM

2006 Mercedes Benz C230 • 105,000 miles

My wife has a 2006 mercedes c230 sport. It had two codes that were intermittent, they were po012 and po022 it was running fine with no misfires or anything noticable until she came to a stop at a light. It started running rough and almost wouldn't go. Codes now po304 305 and 306. I replaced the cam magnets and got rid of po012 & 022. What could cause all cylinders to missfire on one bank? I switched the cam sensor with the other bank and also the coils, I replaced the plugs, now I am at a loss. Could it be an oxygen sensor. If so up or down stream. Thank Jerry
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Jerry29123
February 2, 2013.




The system needs to be monitored for the misses. They need to look at the long term trims. It could be injectors from dirt in the rail or it could be timing on that bank.

Roy



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