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1999 996 P1123 CEL

Engine

Vehicle Information: Model: 996; Year: 1999; Body Type: Coupe; Total Mileage: 51.3K;

Joel, I have the reoccurring P1123 and sometimes P1125 CEL codes every 60-100 miles which I've cleared via Durametric diagnostic software. Changed pre/post cat O2 sensors for bank 1-3 as first try to resolve,no luck. Before I replace the MAF, I'd like to know where and how difficult it is to change out the oil separator bellows hose. Understand this is a potential source for leakage resulting in the same error code.From what I've been reading in the forums, lots of folks are spending lots of money by the process-of-elimination method to fix these type of error codes. Must be a better way?

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