Quote:
Originally Posted by landrovered
When troubleshooting EFI problems you must keep in mind that the error codes are simply pieces of information and not gospel in terms of what the fault is.
Multiple misfires on the same bank as the O2 sensor error tells me that the O2 sensor is probably fine and that code is being caused by the misfires.
If your pre-cat O2 sensor is bad you will get lean/rich error codes not cylinder misfires. Misfires are electrical in nature. Start your search with the things that create the spark fire sequence and spark.
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So spark plug, coils etc? The only reason why I don't think it is the spark plugs is because its unrealistic that all 3 plugs and coils on the same bank went bad at once.
I did have a pending P1133 and P1126 as well before I cleared it. I actually just did a search and most people are saying clean the MAF. I am going to try this next, This is going to surprise me if a simple MAF problem caused about 8 codes to trigger on my car