Question about 2003 Audi A4 Cabriolet

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02 a4 1.8t, oil pressure light comes on at 5 miles. recently had head and gasket changed along with new coolant temp sensor and oil pressure switch. no sludge from antifreeze or oil in oil pan when dropped. oil pressure is at 18 at an idle, vs 20 spec, and at 2500 rpms, pressure is at 37 vs spec of 40. any idea why the oil pressure light continues to come on after the car runs 5 miles. there is no loss of power, and the motor is quiet, no noise in the bottom. any suggestions are appreciated, thank you , tim

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6ya6ya
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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Engine shutter and lack of power

You probably have a vacuum leak somewhere. Check for broken or cracked hoses and/or plastic pieces they connect to. Pay special attention to suction pump, part# 058 133 753 B. Google it.

Posted on Nov 15, 2008

  • 47 Answers

SOURCE: Coolant light on an AUDI TT 2000

It sounds like it is low on coolant. Coolant expands when it warms up so if it is just low enough to trip the switch when it is cold it will shut the light off when it warms up. You should be ok to just top it off but be sure that what you put in is compatible with what is in it. There must also be a leak somewhere in the system for you to have lost some to begin with. Depending on how many miles you have on the car it wouldn't hurt to have the cooling system flushed if it's never been done before. If you do get it flushed take it to the dealer to have it done. Explain to them the low coolant and have them check the system for leaks at the same time. Hope this helps

Posted on Dec 23, 2008

emissionwiz
  • 75822 Answers

SOURCE: 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.

Posted on Feb 14, 2009

  • 1 Answer

SOURCE: 2002 audi a4 oil light issue

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.

Posted on Feb 24, 2009

  • 37 Answers

SOURCE: I Just Bought A 1990 Audi V8 Quattro. I Changed The Oil And

YOUR OIL PRESSURE SWITCH IS DEFECTIVE

Posted on Apr 06, 2009

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My car heats up in stop n go traffic. The temperature gauge can go as high as to the 'RED'. I adding water and coolant everyday. Are the fans supposed to come on as I am driving and the car heats up?


if you are adding coolant every day then you are experiencing coolant loss
could be from a leaking pump gasket , head gasket or other leaking item
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When replacing blown gaskets there are a few things that is best to do, like sandblasting the heads, clean, scrape block and use proper torque an sequence, only removing old gasket and placing new ones won't fix the issue, those gaskets go through extreme conditions, expansion, temp changes, etc, they need to be put mindfully. I mention this because it seems you changed a lot and ended up with the original issue...

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http://howtobyme.blogspot.com/2011/11/low-oil-pressure-light-on-dodge-magnum.html
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http://schematicsdiagram.blogspot.com/2011/12/car-turns-off-due-to-low-oil-pressure.html

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http://technoanswers.blogspot.in/2012/02/toyota-corolla-leaking-oil-from-timing.html

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This will help.

Thanks.

Feb 02, 2012 | 2002 Oldsmobile Silhouette

2 Answers

I have a 02 Chevy tahoe....it sounds like coolant rushing throughout the engine while sitting at an idle and about every 2 or 3 days I gotta add coolant its not much also the low coolant light comes on...


I would perform a coolant pressure test because these engines are known for leaking intake manifold gaskets.Check and see if your oil is starting to turn a creamy tan color.

Jan 24, 2012 | 2002 Chevrolet Tahoe

3 Answers

2002 malibu runs hot.


Sounds like you have a faulty head gasket or maybe a cracked head.This can cause overheating and the check engine light to come on.The code for the o2 sensor is probably caused by coolant getting into the exhaust system and coating the sensor.The coolant fan may work but it cannot remove enough heat from the rad to make the engine cool off.Try some engine coolant stop leak to see if it will help.This maybe only a temperary fix.Let me know if you need more.MOE

Jun 22, 2010 | 2002 Chevrolet Malibu

3 Answers

Volvo 850 smoke coming from exhaust manifold


Not to worry. Run the engine up to operating temp before jumping to conclusions and let the heat burn off any excess oil. A leaf will not do any damage.Do not let the engine overheat while idling and if the oil light comes on switch off immediately.
The smoke from the exhaust is oil deposited by oily assembly hands just burning off. It should dissipate after about 15 minutes at most.(or 5 miles' drive)

Jun 07, 2010 | 1994 Volvo 850

1 Answer

98 cherokee had gunky cooling system, got it flushed and temp gauge was reading low afterwards. diagnostic computer said the cooling system circuit had high input so i replaced one of the temp sensors. now...


STOP DRIVING.

Go to a shop and ask for a cooling system pressure test.

After they pump up the coolant system,they will point out is there any INTERNAL or EXTERNAL leak(s).


Internal leak is the first sign of blowing head gasket. (NOT GOOD)

External leak can just a small hose.


Start monitor cooling loss.

Start monitor the oil level

Change the thermostat and gasket.

The temp sensor is cheap. Change it at the same time.

Use 60/40 coolant mix is you has high odometer reading like 160,000+ miles


DO NOT ALLOW the coolant and oil cross mix.

As soon as it mix,you are ready for a majot head gasket repair.


Good luck.

Jul 15, 2009 | 1999 Jeep Grand Cherokee

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