2002 AUDI A4 OIL LIGHT COMES ON AND CHECK ENGINE LIGHT.
A week ago the oil light on my 02 a4 quattro 1.8 came on.oil level is fine and also check engine light came on.my buddy hooked it up to the computer and i got the code ''system too lean,bank 1''.he cleared the codes and as soon as the oil light comes on again,i get same code.what could it be?not to help the situation,my ''smart'' wife forgets to do an ail change on the damn thing.hasnt gotten one in 18k miles.could that have anything to do with the light being on?
Keep in mind a year ago i had the same problem and it was one of the fuel injectors,replaced that,but since i had driven the car for 60 miles after the light came on,i also had to replace the timing chain tensioner.
An expert who has achieved level 3 by getting 1000 points
An expert that got 10 achievements.
An expert that got 5 achievements.
An expert whose answer got voted for 500 times.
Re: 2002 AUDI A4 OIL LIGHT COMES ON AND CHECK ENGINE...
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.
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need. goodluck!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
My 2005 A4 3.0 convertible audi is not a diesel, but I had a similar experience with a low oil signal going on and after checking the oil, which was sufficient, and replacing the dipstick, the light did not come back on until a subsequent trip. The light usualIy went on when I was close to the needing an oil change. I've had the car, a used one, for about two years, and the oil light minimum signal started behaving like yours early. About a week ago the oil pressure warning light came on. I don't know if there's a relationship, but if there is be careful. Audis of our vintage have a problem with sludge build up that damages the oil pump, which is a costly item. If you drive the car with low oil pressure you may seriously/fatally damage the car. I don't know if the sludge, if that's what you have, can be cleaned out, but I'd do it if it can be. My mechanic advised me to trade the car to a dealer rather than fix it. Hope you have better luck!
I hope that you had the proper weight oil installed, at your oil change. If your oil is up to the proper level, and it's rattling ,this is VERY bad. White smoke usually means steam in the exhaust, and that means a blown head gasket. Check your coolant level. I wouldn't drive it anymore......until someone knowledgeable can diagnose it!!!!!
It could simply be maybe the person changing your oil never reset the light? or you have a oil pressure sensor leaking or not working.
most of the time its someone never reset the oil change light. even before it goes on it goes by mileage, so maybe it didnt go off yet cause you cnahged it a tad early.so noone even tried to reset it.
I guess you could have an oil pressure problem, but thats going the extreme route.. but if nothing else shows that could be a problem.
There are potentially two different problems here. 1.A fault with the actual oil pressure. 2.An electrical fault with the switching circuit.
If you are confident the problem is not with the oil pressure, disconnect the wiring from the switch for a period of time. If the light still comes on periodically the fault must be with the wiring circuit shorting to earth. There will be no fire hazard to this approach as the voltage will drop over dash lamp.
However if the problem is with the oil supply system, the danger with this approach is you are potentially unaware of a serious problem
Such as the oil filter collapsed or the oil pressure release spring could be jammed open/closed which would cause the engine to not have the correct operating pressure.