I've taken my 2000 Audi A4 in for service many times now... and they can't seem to fix the problem. They say, "The computer diagnostics say it is running too lean, but that's it." They checked for leaks with the colored gas, they replaced the O2 sensor, they replaced the fuel injector... Has anyone else had this problem or know how to fix it???
2006-10-02 16:39:49 · 11 answers · asked by mdawne2 2 in Cars & Transportation ➔ Car Makes ➔ Audi
i own a repair shop,,and work on a lot of the audi,s and i have seen the problem before,,it was caused by a bad catylytic converter on the car,it was making it burn o-2 sensors out on it , and the dealer said they didnt know what it was on it ,i found it in a few minutes of running it,on the one i had the converter would get a little hotter than it was supposed to,,that was how i found it,,it passed the back pressure test ok,,but would heat up after being drove for a while,,i called them and told them what it was ,and they was greatfull that i got the customer off their back,,,i thought it was a poor attitude to have on someone that had spent that much money for a car,,but thats them,,not me,good luck with it,,i hope this will help you.
2006-10-02 16:49:29 · answer #1 · answered by dodge man 7 · 0⤊ 0⤋
It is a software defect in the computer. Cars have a computer that runs everything. The dealer should know they need to reset the computer. This happens when the motor reaches a certain mileage and the plugs need to be changed. Platinum plugs must be used and the timing belt should also be changed. If this has been done assuming you are over 60,000 miles then the computer needs to be reset. The computer on a car is about the size of a laptop. I have sold these art NAPA auto parts. Call the company about this. Somebody does not know what they are doing. It could also be a defective light sensor. Computers will do a check engine light if your car can't pass the emissions test. A smog test will reveal the error code. If your gas cap is on wrong this can cause the light to go on as well. It is usually the emissions system. If your oil needs changing or you water pump goes out this will happen. But if your water pump goes the car overheats fast. Then the engine blows up. So that does not appear to be the case. Check the catalytic converter. It may still be a warrantied part. It can heat up after you drive and not show in a test.
2006-10-02 16:47:50 · answer #2 · answered by Anonymous · 0⤊ 0⤋
If it says its running lean then the next step is why? Does the car have a vacuum leak in the intake system? Is one of the other sensors on the car telling it to lean out? Are you running the correct octane gas? All of these things can lead to the light coming on. Are you taking it to an Audi shop or general repair? Make sure the shop you go to is up on Audi.
2006-10-03 08:18:20 · answer #3 · answered by uthockey32 6 · 0⤊ 0⤋
Yes i have an A4 it has a sensor on the rear of the cyl head with 3 wires going to it this sensor this helps control the fuel air ratio.Also worried that they replace fuel injector a4 has 4.Get them to check the resistances on the sensor .
2006-10-03 09:56:25 · answer #4 · answered by mick 6 · 0⤊ 0⤋
I don't think I've ever owned a vehicle that at one point in time the "check engine" light didn't come on and stay on for good. It has never resulted in me to have any serious mechanical problems with any of them though.
2006-10-02 16:43:00 · answer #5 · answered by tommygirl 3 · 0⤊ 0⤋
Did they run a diagnostic check on the computer itself? Sounds like you may have a bad computer chip, particularly if the car is running ok.
2006-10-02 16:43:57 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Have you changed the oil recently? or perhaps filled the gas tank?
If the gas cap is not in all the way, in some cars, the light will stay on. Remove the gas cap and put it back in.
2006-10-02 16:44:05 · answer #7 · answered by ppgarciaus 1 · 0⤊ 0⤋
The most common cause is letting the engine run while the gas filler cap is off.
2006-10-02 16:41:58 · answer #8 · answered by Jay 6 · 1⤊ 0⤋
It's the wobbleshaft sensor...
2006-10-02 16:47:59 · answer #9 · answered by Anonymous · 0⤊ 0⤋
try replacing your fuel filter
2006-10-02 16:41:47 · answer #10 · answered by mustang656 4 · 0⤊ 0⤋