Question about 2003 Audi A4 Cabriolet

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OIL PRESSURE WARNING LIGHT SHOWN UP ON AUDI A4 1.8 T SPORT

OIL PRESSURE WARNING LIGHT SHOWN UP AFTER ABOUT 5 MILE

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  • roberta06 Apr 16, 2009

    THERE IS NO OIL LEAK, OIL IS AT ITS CORRECT LEVEL(THE LIGHT SHOWS UP IN RED)THE OIL SENSOR LIGHT IS ONLY SUPPOSED TO SHOW UP IN YELLOW IF THERE IS A FAULT ON THE SENSOR

  • roberta06 Apr 18, 2009

    thanks very much for your help i will giveyou feedback if this rectifies the problem

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  • 297 Answers

Is a pressure converting element on the block. Can be leak or shot. Or wire harnes problem worst case. If leak you see dripping oil mostly. Had that 2 times on a car.

Posted on Apr 16, 2009

  • astrid prieto Apr 17, 2009

    Check the element (sensor) on signal.

    Replace if necessary. Then you can have a clogged oilfilter on bypass (spring loaded) depending on construction or leaking oilfilter seal. Or after heating up another problem on the block. In my first solution I already said that the element is to be suspected at first always.

    For the check you need to be handy and measuring the electrical signal. Are you sure it is not the alternator charging light you are seeing? If no mechanic you have to take it to an on place mechanic.



    Checked the colour of the oil? Grey is wrong. Worst case your pump does not build up pressure. Did you see you dealer recently before problem arose?

    Appreciate my work.







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Oil pressure on my 1991 Nissan sometimes drops to about 5 psi at idle when at operating temp. Other times it will drop to a more normal 25-30 psi. Is there is a high pressure relief valve sticking?


5 psi then 25 -30
what are these readings from ..an after market oil pressure gauge ?
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what make of nissan
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would first replace oil pressure sender
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1. As a basic measure I would make sure the correct grade and spec oil is going in the engine. You can no longer trust that a local mechanic or even a dealer service center will necessarily use the required product as stipulated by the manufacturer. It is always better to buy and supply your own so you know the correct product is being used.

2. I would not assume there is a problem with the oil pressure warning light even though there could be.
The first thing the mechanic should have done when you reported the oil pressure issue is to hook up an independent mechanical oil pressure gauge and check oil pressure when the engine is hot at different RPMs. Any oil pressure issue will usually show up at idle when the engine has been warmed up properly and the engine oil is hot (unless you have some kind of intermittent oil pressure relief valve that is sticking). Just replacing parts without actually knowing what the oil pressures are at different RPMs is being sloppy and negligent.
This is what you need to do now. Contact a business that can hook up their own pressure gauge to your engine and have them check the oil pressure readings at various RPMs when the engine is fully warm. If there is a low oil pressure issue it will show up on the oil pressure gauge. As you have a new oil pump there should be no issue now with oil volume or a sticking oil pressure relief valve which on your engine should be part of the oil pump assembly.

3. Worn engines will not be able to sustain required oil pressures. Oil pressure is not produced by the oil pump. The oil pump produces oil flow but the resistance to flow is what produces the oil pressure and that resistance is created by fine clearances between operating engine parts especially on the crankshaft and components connected to it. Once the engine wears the clearances increase and the oil flows past the parts much more easily and produces/builds much less pressure.
How well your engine with over 90000 miles has been maintained depends on how often all the owners changed the engine oil and filter , whether they kept the engine oil level up to full (most owners rarely ever check oil levels between services) and whether they always used the correct product. Manufacturer oil change intervals shown in service schedules can be 10000, 12000 miles or more which is much too infrequent for the type of use 95% of private vehicles experience which typically are on the severe to very severe use end of the spectrum. Engine oil typically needs to be changed at least at half the mileage shown in service books (at least twice as frequently) and thus at least every 5000 miles if you want your engine to last.

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1 Answer

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The engine oil pressure gauge on my daughter's 1992 Audi 100 is around 5, indicating that the oil pressure is very high. She also reports occasional warning sounds. I started it today, the gauge remains...


If you put too much oil in an engine it will exert excessive pressure on the oil pump which can lead to pump failure and/or failure of engine seals. I am not very familiar with Audi/VW but the warning light could mean not enough or too much oil in the system. Start the car and let it run for about 15 to 20 seconds then turn it off and check the oil level. If the level is over the fill line you will need to drain some of the oil. As odd as it sounds it is better to have too little oil in the engine than too much. PLease rate me on this answer.

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1 Answer

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You're low on oil - the Audi dipstick isn't the most accurate thing out there. Add a quart and see what happens.

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1 Answer

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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?

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2000 528i bmw


wow sorry to hear that it sounds like the head gskt blew but im scratching my head on that one because that is not very comon for the engine in that car, But i would say head gskt since the oil pressure in the car runs way higher than the pressure in the cooling system so thats why it would have blown a hole in the radiator, and mixed in with the coolant, i would not say that the place that changed your oil is at fault they could not have caused that to happen

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