Question about 1998 Buick Century

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Coolant low light on and check service engine

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If your coolant low light is on it usually means you need to add coolant to the plastic reservoir, but if the coolant level is ok in the reservoir but the light still stays on then the coolant level sensor in the reservoir is not functioning properly. The check service engine light can mean anything from serious engine problems to a simple oxygen sensor reading that the computer didn't like. You can stop by your local auto parts store and they will read the codes and tell you exactly why it is on and what the computer has detected.

Posted on Nov 16, 2009

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Jetta Warning Light


It says that your vehicle is low on coolant.Get the coolant level checked.If low has to be changed.

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Oct 09, 2012 | 1995 Volkswagen Jetta

2 Answers

My check engine light has come on at 85500 miles, but I had taken it and had the oil changed and all fluids checked the day before. Had someone put it on the code reader and it said coolent low, checked...


You can reset the cel with the scanner-or disconnect the negative battery cable and leave it off for about 5 minutes-if it comes back on, you do have a problem and the code you get needs to be investigated. A low coolant sensor should not set a check engine light, what was the actual code (the number)?

Aug 07, 2011 | 2003 Volkswagen Beetle TDI

3 Answers

'low coolant light' flashes all the time and then 'service engine soon'


These problems may or may not be related. The Check coolant light means that the coolant level in your radiator is low. If you have checked it and it is not low, then the sensor is most likely defective. The low coolant sensor will not turn the Check Engine light on - even if the coolant really is low. There are many things that can cause the Check Engine light to come on. You will have to scan your Engine Computer to find out why it has been turning the light on.

I did have a problem on one of these cars one time where the Check Engine light was coming on and there were several codes for the Throttle Position Sensor(TPS) and the Manifold Absolute Pressure (MAP) sensor and the car ran really bad. The Check Coolant light was also on. After checking it out I found that the coolant level sensor was shorting out the 5 volt reference circuit (VREF) from the computer and causing the whole problem. Replacing the coolant level sensor fixed the car.

Mar 06, 2011 | 1995 Chevrolet Lumina

1 Answer

Low coolant light is on and service traction control no engine light but there is no power will have trouble going up small hills?


when coolant level is low the ecu goes into "safe" mode, top up coolant and see if light goes off, if it does see if it drives ok. check for coolant loss and repair as required

Jun 12, 2010 | 2002 Chevrolet Monte Carlo

3 Answers

Where to add coolant for radiator on a 95 vw jetta?


Add Coolant to spherical reservoir at right rear of engine compartment as viewed from front. If it is low the coolant gauge flashing light will warn you of a low condition.

Jan 01, 2010 | 1995 Volkswagen Jetta

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

Low coolant light 3.8 L


If u haven't replaced the coolant level sensor do so, they are prone to this problem. Here is the part number & a picture, about $44.00

STANDARD MOTOR PRODUCTS Part # FLS24

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Feb 09, 2009 | 2002 Buick Regal

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