Question about 1999 Volkswagen Passat

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My daughter has a '99 Passat at college and called me because her "low coolant" light came on. Is this a oil-cooled engine, or one that utilizes standard coolant?

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Hallo
vw has sensor inside wather coolant reservoar. Top up engine coolant (antifreeze).
marko

Posted on Sep 23, 2009

Testimonial: "Good to know that it is essentially a level sensor mechanism and that adding coolant will satisfy the situation."

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99 gmc suburban's oil is light brown, had no coolant


Well if the coolant escaped and there are no external leaks, something happened to the cooling system to let it into the engine oil.
Either a head gasket, intake gasket, or some other engine failure.
I would probably notify the shop that did the trans service just in case it was something they did.

Dec 17, 2012 | 1999 GMC Suburban

1 Answer

1999 VW Passat heat not working


Could be your thermostat... If defective, it will not allow the engine to heat up. Take the coolant cap off before you start the car when it is cooled off. start the engine and let it idle, look at the coolant. The coolant should not be flowing or moving right when you start the engine, if it is, the thermostat is bad. If you dont have enough coolant and you see it is low, this may also cause the heater to stop working. Someone may have by-passed your heater coil, check that. Sometimes when a heater coil leaks, people will by pass it so that they can continue to use the car or they cant afford to change it. It should be located on the passenger side under the dash or on the firewall inside the engine compartment on the passenger side. Another thing could be your climate control which is a fancy name for the heater controls on your dash, sometimes the switches become defective and will not operate the heater.

Oct 25, 2012 | 1999 Volkswagen Passat

1 Answer

Low coolant light stays on


If you've checked your coolant level and it is ok, then more than likely engine oil is contaminating your cooling system. GM published a service bulletin on this exact problem. Possible sources of contamination are internal engine leaks, improper service procedures, or addition of excessive antileak addatives into the cooling system. The problem occurs when the oil leaves deposits
on the "low coolant warning sensor" which causes a false reading and puts the light on. The sensor is mounted on the right hand tank of the radiator. Flush the cooling system, replace the sensor, and add the proper amount of O.E. recommended coolant.

Sep 16, 2011 | 2000 Chevrolet Impala

1 Answer

2003 VW PASSAT. Check engine light goes on and


8.5 hrs + parts sounds about right. But why would a 7 year old cars oil pump fail? They usually last a lifetime. Has there been a lubrication problem? Low oil, cheap oil, wrong oil? But then again my daughters 04 Toyota needed a valve job, head gasket and water pump recently. I'm doing 90% of work and it still cost about $2000. Her problem was bad oil!

Mar 11, 2010 | 2003 Volkswagen Passat

1 Answer

I bought used 2006 VW Passat with 52,000 miles. Oil level low and black color.. after changed oil find oil in coolant tank. engine runs ok... check engine on... any advice?


head gasket leaking. does the oil cap look like pudding stuck inside of it? if so that was caused by the tow fluids mixing together in the engine

Jan 17, 2010 | 2006 Volkswagen Passat

1 Answer

Check engine light on maybe low coolant is that 1998 VW Passat


or brake fluid ,or oil ,or a sensor in somewhere ,

Dec 03, 2009 | 1998 Volkswagen Passat

3 Answers

Coolant level low light comes on and coolant level is not low in reserve tank or radiator.


There is a TSB for this problem. Here it is.


Bulletin No.: 04-06-02-007

Date: August 11, 2004

TECHNICAL

Subject:
Low Engine Coolant Level Indicator Always On (Diagnose Low Coolant Level System Operation/Check Sensor for Oil Contamination)

Models:
2000-2002 Buick Century, Regal
2000-2001 Chevrolet Lumina
2000-2002 Chevrolet Impala, Monte Carlo
2000-2002 Pontiac Grand Prix
2000-2002 Oldsmobile Intrigue


Condition

Some customers may comment that the low engine coolant level indicator is always illuminated.


Cause

The cause of this condition may be due to engine oil contaminating the coolant. Possible sources of oil contamination are internal engine leaks, improper service procedures, or the addition of some types of anti-leak additives to the cooling system. Once in the coolant, the oil leaves deposits on the level sensor creating an insulating film. This film results in a false activation of the coolant level indicator.


Correction

Diagnose low coolant level system operation and check the sensor for oil contamination using the procedure listed below.


Important: No coolant supplements should be used in GM cooling systems, other than what is approved and recommended by GM. The use of "aftermarket" over-the-counter sealing and cooling supplements may affect the operation of the low coolant level sensor. Discoloration of the coolant recovery bottle is normal and does not necessarily indicate that coolant contamination is present. Flush cooling system only when instructed by this bulletin.

1. Verify that the coolant is at proper level in the radiator and the coolant recovery bottle. If the coolant is low, add proper amount of 50/50 water and DEX-COOL(R) mixture. If the low coolant light operates properly, diagnose the cooling system for loss of coolant as outlined in SI. DO NOT proceed further with this bulletin.

2. Remove the low coolant level sensor. Refer to Coolant Level Module Replacement in the Engine Cooling sub-section.

3. With the key on, the engine off and the coolant level sensor disconnected from the vehicle wiring harness, observe the low coolant light:


^ Light is on - Chassis wiring or instrument cluster concern. Follow the appropriate diagnostic information in SI.

^ Light is out - Proceed to Step 4.



4. With the key off, connect the coolant level sensor into the vehicle's wiring harness. Connect a ground wire (1) to the battery negative terminal. Using a sharp probe (3) attached to the ground wire, ground the coolant sensor probe (2) as shown in the illustration. Make sure a good contact is made. With the key on and the engine off, observe the low coolant light for at least 15 seconds.


^ Light is on - Replace the low coolant sensor and re-check system operation.

^ Light is out - Proceed to Step 5.


5. Using a small wire brush or emery cloth, polish the low coolant level sensor probe to remove any film or oxidation. The probe should be a bright brass color when finished. Use Brake Parts Cleaner to flush removed deposits from the low coolant sensor probe. Re-install the low coolant sensor into the vehicle and proceed to Step 6.

6. Flush the cooling system and install new DEX-COOL(R) mixture as outlined in the SI. Check the vehicle's warranty history to determine if any engine gasket had recently been changed. If there has not been a recent gasket replacement, locate and repair the source of the engine oil contamination.


Oct 31, 2009 | 2002 Chevrolet Monte Carlo

2 Answers

VW Passast low oil - light came on - ok to drive?


If you are not driving far no problem. If you are just put a quart of oil in it until you get to the station.

Dec 10, 2008 | 1999 Volkswagen Passat

2 Answers

VW Passsat - 98 -


ABS and coolant are unrelated unless there is a problem with the ECM (engine control module) or instrument panel. Is the red coolant warning sign for coolant level or temperature?

With ABS if there is any failure with any brake electronic component (sensor, motor, or fluid level etc) the ABS will shut down completely and flash the light. If the light is on or flashing the ABS is non functioning.

I need better information on the coolant and ABS to give better information.

Nov 01, 2008 | 1998 Volkswagen Passat

2 Answers

1999 bravada oil


check for coolant in the oil. remove the oil fill cap and look for a white milky substance. most likely engine damage has already occured because to have that low if oil pressure there is too much "clearance" between the bearings and the components they work with-(crankshaft,camshaft,connectiong rods). that vehicle came with dexacool coolant and it would shorten the life of the intake gaskets. they then would leak into the engine ruining the bearings over time. the skip can happen from lifters hydrolocked with the oil/coolant solution. take it to a reputable mechanic for an analysis......Good luck.......Scott

Sep 22, 2008 | 2000 Oldsmobile Bravada

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