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Hi, I've just fitted a CAI to my s3, ran a dtc check today and it's given P0171 which is fuel trim: too lean. According to ross tech, common cause is intake leak obviously meaning lots more air getting in which sounds right with the new CAI. Has anyone else had similar issues? I'm hoping to...

Hi As per title I'm new to the forums just recently bought a 56 plate s3 8p2. Actually pretty sure the previous owner was on here called doug? Scottish guy cracking bloke! Im looking at fitting an oil catch can to prevent any more crap than necessary being put anywhere near my engine internals...