Question about 2001 Volkswagen Jetta TDI

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The oil engine light comes on while driving.

I've already had a new oil sensor light put in.
I've already checked that the pump was working.
The oil line has been cleaned out.

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Check the oil level

Posted on Apr 14, 2009

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3.5L V6. Why does oil pressure light turn on intermittently?


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.

Feb 01, 2016 | 2011 Hyundai Santa Fe

1 Answer

Keep getting code p0022


Camshaft position'A' timing over-retarded bank 2 not the sensor

Apr 14, 2015 | 2006 Ford Expedition

1 Answer

After driving my car 2006 chevy impala for about 20 miles the dashboard warning light oil pressure low stop engine and the oil warning light appears, but if step on break or slow down it goes out..wha


Verify that the engine has the proper amount of oil. The inertia from accelerating may be moving the oil in the oil pan away from the sensor and causing it to send a signal, then when you slow the oil levels out and the sensor go's off. I've had this happen alot with a taurus that I owned. The simple solution was to top off the oil to the correct level and the sensor did not come on again (until it ran low again, had a leaky oil plug on oil pan).

Jun 08, 2012 | Cars & Trucks

1 Answer

Low oil pressure light comes on when i stop giving the car gas like when i come to a stop sign or light and every now and again the check engine light comes on. I change the oil to a heavier oil and the...


This may mean engine wear or bad oil pump. I would have the oil pressure tested to see if its a shot some where or if the pressure is really low, this is done by removing the sensor and installing a gauge and driving the car to see if the pressure is low, if the pressure is low then more checking is neede to see why,you may have worn engine bearings or bad oil pump. depending on the mileage it may be smarter to replace the engine, not knowing what internal damage has been done already. good day.

May 10, 2011 | 2006 Pontiac Grand Prix

1 Answer

I loze oil pressure after driven awhile what could be causeing this


Check you oil pressure with an in-line gauge to see if the sensor is working properly. These sensors go out often due to the heat of the engine. It is easy to replace this sensor. It is stuck in the engine block. To remove, you just unclip the electric connector, and turn the sensor conter-clockwise untill it comes out. Use thread-lock on the new one, and make sure to install the heat-shield for the sensor.
If you are losing oil pressure, it could be clogged return lines, or oil pump is going bad.
If it is the lines clogged up...then you can try to clean it by putting in an oil cleaner and drive for a short distance, then put in fresh oil & filter. You may need to disconnect and clean out lines if it doesn't work.
If the oil pump is bad, then it is a pain to replace, since the timing belt spins it's pulley. But it can, and must be done or your engine will suffer.
Good Luck!

Feb 11, 2010 | 1996 Jeep Grand Cherokee

1 Answer

The tachometer jumps


did you check the cam sensor? the cat? ae you loosing power at 2000 rpm?

Sep 30, 2009 | 1998 Chevrolet S-10 Pickup

1 Answer

2001 a4, oil pressure light alarm.


Your mechanic is yanking your chain. (or you mis-understanding.)

Oil pressure light does not have to be "reset." There may be CODES that need to be reset but they would turn on the CHECK ENGINE LIGHT. (I think, on your car, this is picture of engine with a check mark.) If the Check Engine Light (CEL) is flashing, it means you have a serious engine problem and should NOT be driving the car without finding the reason for the light. (Around here, many auto parts store will "pull the codes" for free.)

Oil pressure light could mean you are low on oil, have a bad sensor, wire or even a oil pump. The oil pump is inside the engine.

Aug 20, 2009 | 2001 Audi A6

4 Answers

2001 chrysler sebring oil pressure light comes on when the car is stopped at red lights while moving the light never comes on .Another question i have is why does the air conditioner sound so loud outside...


The oil pressure light is a serious problem...this needs to be looked at right away, or you face a seized engine (one that no longer moves). It sounds like the oil pump will need to be replaced. The reason the light goes out while moving, is that the engine is running faster, so the worn-out pump is able to create enough pressure to shut the light off. Don't hesitate to get this fixed ASAP! As for the A/C, it could be due to a lack of oil in the system (due to a leak) or a worn out drive clutch or belt.

Jul 30, 2009 | 2002 Chrysler Sebring

1 Answer

My oil light keeps


You need to have oil pressure checked manually with oil pressure guage. There is a good possibility that the engine has excessive wear or a bad oil pump and oil pressure is really low. (It's like have a bad heart) That would definitely trigger oil light.If you have low pressure and its not taken care of immediately it will ruin the engine from lack of lubrication to vital parts. Good Luck contact me if you need more help.Thanks for using FIX YA

Jan 06, 2009 | 2002 Chrysler Sebring

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