i have a fault with my 2001 s3, eml keeps coming on after 100 miles of being reset, my mate works as a mechanic for audi and reckoned it was the post cat lambda probe...so with trust i bought a new at £120 and guess what...!!! The fault code is P1136 Fuel trim: bank 1 system too lean. i've looked around and noted it could be a split hose somewhere, so ive checked everything i can see...anyone think it could be the manifold lambda? car has an apr chip and neuspeed induction kit.