cliffcoggin

Chris. My guess, and I stress guess, is that either the instrument cluster or the ECU has failed. I suggest testing by an automotive electrician. As far as I know the ECU can not be repaired however the panel can be.

Glad to hear it is sorted.

Three failures in succession suggests to me that the cause lies elsewhere, unless they were unfit for purpose. To add to Gareth's ideas I would also check all the wiring between sensor and loom, particularly the connectors. Look for cracked or damaged insulation, dirty or corroded contacts, loose plug connections etc.

There is something wrong here Lewis. Either you misunderstood what he said or he is extracting the urine. [1] An engine does not take in air through the oil filler cap. It might spay a bit of oil if the cap is missing, but it will not take in air and it will not make a noise. [2] It is rare for an injector to fail, it is verging on the unbelievable for its new replacement to fail two months later unless there is an underlying cause that has not been rectified. Nevertheless if the engine is missing on one cylinder it would sound like yours.

Really? So what specifically do they mean by that, and what do they propose to rectify the fault? It would help if you mentioned which engine and fuel you have.

New or not, it can still be defective, especially if it is a cheap after market sensor. If you paid for it to be done I suggest you take the car back to him. On the other hand there may be something else involved. Why did you change it in the first place? Are there any other symptoms?

Sounds a little like a timing chain (if you have one) and/or tensioner rattle. Your garage should advise you.

Good luck with that John. Real Audi parts and good quality non-Audi parts are notoriously expensive, so if you find any please let us know.

Daniel. The evidence I have read on this forum suggests that error codes are almost useless for diagnosing faults, so I do not believe you need to change the coils a second time. Possibly you may not have needed to change them the first time as they are generally reliable. Look back through recent posts in this forum for suggestions of alternative causes of your misfire. They include the ECU, the injectors, and low compression. As a first step I would get the compression pressure tested to ensure the essential components of the engine are in good order before investigating the auxili

Octavian. You have used a decent quality oil so there is no point wasting money by changing it again. Your problem lies elsewhere.

Why make things difficult for yourself by messing around with part numbers when all you want are the parts? Search for "used audi car parts" in your favourite search engine and you'll find dozens of sources, none of which require you to know the part number.

Nobody knows Audi part numbers better than Audi themselves, so why not ask them?

Well you signed up and started a new topic, so it's plain sailing from now on. Ask a question; even better, answer one; the more the merrier.

Clive. From what I have read on this forum, even Audi dealers' equipment can not be relied upon to give reliable diagnoses, so I doubt an Ebay purchase will be better. An auto electrician might be a better bet.

Igor. Considering the puddle of oil is right next to the oil filler cap I'd say that is the most likely candidate. Is the cap tight? Is there a seal under the cap? If not, crankcase pressure may have blown oil out of the filler neck.