Hello all,

Well I sold my 97 A4 for a 01 s4 Avant last week and of course the Idiot Lights began... I am getting P1113 and P1131 which from my research on here suggests that both the passenger side and driver side pre-cat o2 sensors need to be replaced. Is this correct? Any solid answers will help me out before I head to ECS with the credit card... Thanks guys.

your correct on that sir im in the same boat as you but for only one and im just gunna rplace all 4 so i have no worries down the road

Yeah, they're really easy to replace with the right tools. Do a search for my DIY "o2 sensor replacement".

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2000 Audi S4, Bailey DVs, MTM Chip, VDO Boost Gauge, RS4 Clutch, K&N, Samco Hoses