Hi guys.i have a 200 a4 1.8t. my oil light has been going on and off for over a week now.its not on all the time.today my mechanic put a new ol pressure switch and i drove the car for about 15 miles and it hasnt gone on yet. i know these engines are known for having an oil sludge problem. he did an oil pressure test and got the following results:
25 psi at idle with car warm
50 psi with car @ about 2000 rpm's ,but after seconds it dropped to around 40-45 psi.let go of the throttle and back down to 25 psi. what would you guys say?are those #'s good? any feedback would be appreciated.
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Re: 2002 audi a4 oil pressure light issue
THOSE NUMBERS ARE VERY GOOD, THE PROBLEM MOST LIKELY IS A DEFECTIVE OIL PRESSURE SENDING UNIT, HAVE REPLACED 100'S OVER THE YEARS FOR THIS SAME ISSUE, GREAT THAT U CHECKED THE PRESSURE THOUGH, IF THE LIGHT WAS INDICATING ACTUAL LOW PRESS U COULD HAVE WASTED THE BEARINGS IN THE ENGINE.
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HI, you dont say what the sound is like, Have you checked the engine oil, this car as the PD engine fitted and only use good fully synthetic oils.it could have gone into limp mode for lots of reasons, go to a reputable repair centre and get the car checked out, good luck.
is this all mate.look for the oil light switch and over it is a rubber cover ,pull the cover back and you will see that it is full of oil ,clean the cover and fit a new switch,or just leave the cover off so it drip`s down engine .light will then be off
something has been left disconnected. look at the back of the head (remove the plastic cover on top of the engine, just there for looks) and make sure everything is hooked up. if not you need to return to this mechanic and have him correct the issue.
Sorry to hear you are still having problems.If you are going to change the pump I would certainly not recommend you do it yourself.If it is the V4 motor I am thinking of, you would need to get to it by removing the rear seat ,remove access panel , and pretty much play around in the gas for an hour or so to get it off in the first place.
What I did find was this on the net on a recall by Audi to replace 2002/03 model fuel pumps as noted below.
RE: 2002 Audi A4 Fuel Pump Change:
I just had my fuel pump changed out by the dealer. Here is what the letter said-
"Safety Recall JL 2003 year Audi A4 quattro with 1.8L Turbo or 3.0L engine and 2003 Model year Audi A6 with 3.0L engine" The fuel pump on some affected vehicles may contain a carbon brush set that is susceptible to premature wear.
On invoice it says-
JL12 Install fuel delivery unit and sealing washer. 1 8E0-919-133-G Washer 1 8E0-906-087-P Fuel Pump
No charge for unit or install. Just call them up and give the vin number to see if your car is affected.
On the other note of your code error '1&3 misfire',try and have it re-set (it might be an old error)and see if it comes back.
Hope this helps ,and I will research your problem further with pleasure if need more help.
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.
The car has entered into fail safe mode. It wil not allow the engine to rev high but allows you only to get to a mechanic or to get some oil into the engine. What's the level like? Is there any trace of leakeage?