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Re: 2001 Audi A6 quattro 2.7l w/ O2 heater codes
Posted to Technical Discussion Forum on 8/28/2007

Well, it's back...

Same codes and now the heaters resistance in data blocks 41 and 42 all come up as "unavailable" after doing the 3K rpm warmup. ALL the sensors come up with that, no resistance numbers at all. Fuse 34 is good, block 41 and 42 show the compu... Login to read more.