Check engine light keeps coming on in 03 Audi 1.8 T with 125k miles. computer and mechanical inspections show nothing wrong. Mechanic thinks it must be oil sludge buildup despite the fact we used nothing but synthetic oil and had regular oil changes. Any other ideas or is this car toast?

SOURCE: Audi 80 oil pressure light

i think from memory that the oil pressure switch is at the back of the cylinder head, if its not there it will be located just above the oil filter, these switches are very cheep to buy and can be bought from any good motor factors. You are right to suspect the switch, its the first thing to eliminate before bogging your self down with more complicated and expensive problems.

Marvin

• 85242 Answers
• Posted on Oct 13, 2008

SOURCE: Oil questions for 2003 Audi A6 Quattro

oil type is either 5W-30W or 10W-30W depending how cold your climate is, as far as having the car properly taken care of, the Audi dealer is the best option, they have all the proper tools and service info needed to keep the car in top running condition.

SOURCE: 2005 Audi 1.8 a4 check engine light on and car now spudders??

FYI also when you get those codes you can look them up and get their description at http://www.check-engine-light.com

SOURCE: A6 engine ''deep rattling'' noise

go to scottykilmer.com - i use this guy a lot - you just have to sign in - first name only! or whatever you want to call yourself. it is 100 percent free and he is an expert on all cars - you can expect an answer within an hour or so! this guy knows more than one person should know - trust me - no fee for free info? cant go wrong

SOURCE: 2002 AUDI A4 OIL LIGHT COMES ON AND CHECK ENGINE LIGHT.

The code system too lean, is caused by the bank 1 02 sensor, as far as the oil light coming on with oil ok,I would say the oil sending unit. Have those checked or replaced. Without testing this and that, it's hard to say what's causing it.