I had those two codes in the past, did the usual suspects, maf cleaning, etc... and I also had oil seeping in those same places. I did plugs and tubes, and it solved the oil seeping, and also the codes haven't come back. I don't know if it is related. If oil could seep out, could air leak in? Does that even make sense. I also did several other repairs at the same time, new fuel filter and new passenger side post cat o2 sensor, so it may have been one of those other things...
Steve
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