Question about 2004 Volkswagen Touareg

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I have this problem myself , on a 2001 1.8td transporter

Its been going on too long! had oil pressure checked and the switches changed. all i have been advised its the dash board with a fault. Im in the middle of trying to get in to the dash board to erradicate the problem!

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Posted on Jan 02, 2017

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SOURCE: car wont start

try to change the G28 sensor (rpm)


Posted on Aug 23, 2008

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SOURCE: Low Oil Pressure indicator on

the cheapest thing to do is replace oil sending unit , it could be faulty ,and give wrong readings .

Posted on Dec 03, 2008

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SOURCE: my dash board instrument came up

change oil filter and refill with normal oil amount

Posted on Mar 17, 2010

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SOURCE: My car is Volkswagen polo

Do not assume that the low oil pressure warning is a false one or that you only have a faulty oil pressure sensor. Your engine may in fact be running with low oil pressure once the oil heats up and thins out. 8-10 miles of running is enough to get the oil hot. It is significant that you only get the low oil pressure warning once the engine oil is warmed up.

If the oil pressure in the engine is low, engine lubrication will be impaired and the engine can be badly damaged so you need to run an engine oil pressure check.

1. How long has it been since you have changed the oil in the engine? If it has not been changed in the past 6 months then change it and change the oil filter at the same time. You must only use the oil specified by VW for that particular engine.

2. When new oil is heated it thins. If it is old and contaminated it will be even thinner when warm. You will get less oil pressure when the oil is thin and hot and more oil pressure when it is thick and cold. Fresh new oil is a little thicker as it has not been diluted with petrol and other contaminants.
Oil pressure also varies with engine speed (RPM). At idle or low engine RPM the oil pressure is lower.

After the oil is changed the car needs to be run to check if the oil pressure warning still appears. (I suspect that it probably will). If it does appear then an independent oil pressure gauge needs to be connected up to the lubrication system in the car to check the engine oil pressure. This is best done when the engine oil is hot because this is when you are getting the low pressure warning. Any competent mechanic will be able to do this. ( The useless ones will not). The oil pressure can then be properly checked on the gauge at various engine RPM. If there is a low oil pressure reading from the gauge then there could be a problem with the oil pump, the oil pick up or the oil pressure relief valve in the engine.

4. You mentioned that you see the oil pressure warning disappears once you accelerate. I suggest this is only occurring because with an increase in engine speed (higher RPM) the oil pump speed is increasing and the low oil pressure problem is being overcome temporarily. However as soon as the engine RPM drops the oil warning will appear again which means the engine is running with below minimum oil pressure at that RPM.

Even when you get no warning, the oil pressure in the engine could still be running significantly below the optimum level.

5. It is possible that the oil pressure is fine and that the problem is an electrical gremlin as these cars suffer from a variety of electrical faults. However from what you have described I think there is a problem with low oil pressure in the engine and until it is properly checked it is unwise to assume that you are just getting false oil pressure warnings.

I hope this helps.

Posted on Dec 13, 2010

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Posted on Dec 20, 2010

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2003 ford expedition low oil pressure light. car keeps turning off. what is going on here? what is it going to cost to replace the pump ?

replace oil pressure sender switch
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fit a sandwich plate oil pressure reader between oil filter and block
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My oil light comes on after higher speeds while idling at a traffic light.

It may be your oil pressure transmitter switch at fault. There's many different oil pressure transmitter switches. Here are some generic images:
oil pressure transmitter switch Google Search
It could also be that your vehicle is due an oil/filter change.
Is your oil level ok?

It's unlikely to be your oil pump at fault.
  1. Check your oil level
  2. Is the vehicle due an oil/filter change?
The oil pressure transmitter switch simply tells the engine 'low oil pressure'. This usually happens at idling speed due to a faulty transmitter switch, low oil level or there's a need for an oil change as the old oil is no longer up to the job. Oil pressure switches are easily changed.

The important thing is that you aren't getting a warning light when driving at speed. If your oil level is okay and it isn't due an oil/filter change - it probably is the oil pressure switch at fault.

For your own peace of mind try adding an oil additive.


Nov 03, 2015 | Cars & Trucks

2 Answers

Oil pressure won't go higher after fixing all parts fan clutch radiator belt changing the oil with the oil filter & oil gasket still can not go higher the pressure the oil light stays on

It is possible the the oil pressure sensor could be bad.The next thing I would do if the light stays on is to hook an actual pressure guage in place of the oil sensor to get an actual pressure reading from the pump.If the pressure is low and doesn't rise when given gas then it could be a bad oil pump.But I would get the sensor tested by a local service station and then go from there.All electrical components can be tested in one form or another.

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1 Answer

Oil pressure light goes on --check oil oil is okay. now the check engine light goes on too. do you think i need to change my oil pressure switch?

first get the code that is stored in the computer when the check engine light went on. Most major auto parts stores will read that code out for free. If the oil pressure is truly very low, the engine will be damaged so be careful. Changing the oil pressure switch is a safe move. But if the oil pressure remains low on the new switch you must investigate why. The oil filter could be plugged up, the oil pump could be going bad, or there could be a major internal engine problem. That is why you need the code. It could give a clue as to what is happening in the engine.

Feb 09, 2011 | 2003 Toyota Corolla

1 Answer

I have a VW tdi (t4) transporter, which occasionally (2 months ), shows a red oil pressure light for a short period and then, ofter checking the oil is OK it is fine to drive. Today it did the same, but...

The red pressure alarm light is normally activated if you do not have enough oil flow and pressure to the engine.
It can be caused by:
  • Not enough oil: check level and top-up. Engine might be burning too much oil or leaking.
  • Clogged Oil filter: change oil filter and oil.
  • Leaking oil seals: check for any large oil stains and drips under the car.
  • Oil pan pump faulty: you need a special tool to check the oil pump pressure - see your auto mechanic.
  • Oil pressure sensor is faulty and causing false alarm: see auto mechanic.
Hope the above are of some assistance.

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1 Answer

Flashing oil light wont go out on 1997 vw transporter

examine the wiring from the switch. if its ok then replace the pressure switch. if it still doesnt fix it then you have a wiring problem elsewhere but it's easier just to replace the switch first because finding broken wires can be very difficult.

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If you don't change your oil often the oil pump screen gets covered with gunk and will cause your low oil pressure light to come on, and I suggest you drop your oil pan and check because your oil pump can be damaged. Go to any auto zone and they will print out step by step instructions for you .

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The fuel pump on that model runs through the oil pressure switch so that if the truck looses oil pressure,It kills power to the fuel pump to prevent engine need to find the cause of the low oil pressure reading(possibly a bad oil switch).That would be the cheapest place to start,or have it checked with a mechanical gauge.Good luck,

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98 jeep cherokee - 4.0 L low oil pressure at idle once warmed up

The only spec that Jeep gives for the oil pressure is 37lbs @ 1600 rpm. Since you are within specs I would not concern myself with it. Though with a new oil change you will probably notice a slight increase.
Also beware that the 4.0 is known for bad oil pressure switches.
Tell your son to have a safe trip and don't worry.

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