Apparentlya common problem with the Audi is oil sludge. It plugs the pickup tube and causes the low oil pressure light to come on. Have an Audi mechanic test your oil pressure and see if it falls within specs. If it doesn't, he will have to drop the oil pan and replace the oil pump and tube. If you are having an oil sludge issue, if not fixed
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Hereare the most common causes of P0522: Low or No Oil- The first thing that you should do is check to see if there is oil in your A4’s engine at all. If the
2007Audi A4 with low oil pressure and uneven compression testing and checking what is the problem.
Turnsout the location is different for the S5 compared to the RS4-RS5. For the S5 the oil pressure switch is located at the front of the engine. You have to remove the radiator to get to it. For anyone interested here's a screenshot below. I'll keep the forum posted to see if this will have fixed the issue. Thanks.
HiOil level warning comes on my BRE engined A4 unless oil a little (or a lot !) above max (this is oil level warning not oil pressure). Wife has discovered that overfilling it by about 0.5 L turns warning off for a while and constantly trying to stop her doing just that. From the number of posts this seems a common problem and often down to dodgy £85
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audi a4 oil pressure sensor problems
