Question about 2001 Chevrolet Impala

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Check engine on my information center it popped up saying that my coolant level was low then my check engine light came on I went to see why it was on and they told me that it was my coolant sensor I then put coolant in and my check engine light went off.....should I still be worried about it or did the coolant fix it?

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The coolant will have fixed it, if it falls below the sensor the light will light up. it may be worth checking you have no leaks too

Posted on Jan 08, 2009

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Low coolant light keeps coming on but coolant looks full


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I have a 2003 BMW 325ci. The low coolant light came on, but the coolant level is at normal. The temp gauge has only went into the red once, causing the red light to come on, but it only stayed in the red...


Tough to say without a fault code read out. There was a nice service information bulletin about your instrument lighting up like a christmas tree that lead to an engine harness. Your thermostat could also do that. As long as your check engine light NOT on and your coolant level is good, then you should be ok to drive on it. While a jammed thermostat will sometimes not set a fault, it could over heat your engine. With the vehicle COLD, try opening the expansion tank then starting the vehicle, if you see a small jet of coolant then your water pump is good.

Aug 10, 2013 | 2001 BMW 325

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Light on autozone says coolant low but its full ....guy said could be thermastat to go to shop and have them scope it!?


I guess what you are saying is your low coolant warning light is on and you went to autozone to ask why. Right ?
If the low coolant light is on and the radiator and overflow tank are full, the coolant level sensor may have failed. You don't use a scanner to check it, you use a meter.

Dec 12, 2012 | Cars & Trucks

1 Answer

The low coolant light on my 2001 BMW 325i came on today, but only when the heat was on. Once I turned the heat off, after a few seconds-up to close to a minute- the light went off. What kind of coolant...


The coolant type is not the issue but It seems there is a LOW LEVEL OF the COOLANT. Allow the engine to cool down and check the coolant level in the overflow/reservoir tank. If low you need to top up the coolant in the tank. Also check the pressure cap of the radiator, replace if there is low level of coolant in the radiator.
However if the coolant looks murky or rusty then it is best to flush out the coolant and refill with the specified type.

Sep 17, 2011 | 2001 BMW 325

1 Answer

Where is the coolent sensor on 1996 grand cheroke larado 5.2 motor?


This message is for the coolant level sensor. The coolant level sensor is in the coolant reservoir in the right rear corner of the engine compartment.

The sensor is easy to replace. It has a two wire electrical connector which you'll unplug first. The sensor itself is held into the reservoir with a rubber seal. To remove the sensor all you'll have to do is pull up and pop it out of the rubber seal.

The coolant level sensor is what is monitored by the information center. The coolant temperature sensor is monitored by the powertrain control module.

The coolant LEVEL sensor is monitored by the vehicle information center, not the coolant temperature sensor. The temperature sensor is for the gauge on the dash and is monitored by the powertrain control module. If there was a problem with this sensor the check engine light would be on.

Hope this helps.

Sep 16, 2011 | 1996 Jeep Grand Cherokee

2 Answers

I changed my oil two days ago. the oil light pops up only when i stop or breaking. Why is it doing this?


engine damage
low oil level
incorrect oil
low oil pressure
bad oil pressure switch
bad engine ground
bad oil pressure switch connection or wiring
incorrect or clogged oil filter
incorrect idle speed

Aug 02, 2011 | 2005 Chevrolet Aveo

2 Answers

Low coolant light came on 1999 Oldsmobile Silhouette, went out a couple minutes later without adding any coolant. Adding a little anyway after light went out. Now about 1 1/2 weeks later light came on...


If its not low on coolant and the light continues to come on it is the low coolant sensor in the radiator. This sensor is in the plastic side of the radiator and just pops off. These sensors are always a problem and don't always require replacement of the sensor. What happens -especially if you are using red DEX-COOL coolant is that the coolant gets hard and crusty inside the sensor and wont allow the coolant to enter and make contact with the sensor. Simply take the sensor off and blow compressed air or water pressure in it to free it of debris. Easy fix-hope this helps!

Dec 08, 2009 | 1996 Chevrolet Camaro

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

1 Answer

Buick 1999 century replaced the sensor light and still comes on.


your buick century has a low coolant level sensor located in the passenger side of the radiator , sometiomes the sensor get covered with coolant sludge and will show that the cooling system is not filled , sometime the radiator is just still low on coolant . check the radiator when the engine is cold ( IF HOT WAIT !!! 30 mins ) and make sure the level is above the sensor.

Feb 06, 2009 | 1999 Buick Century

4 Answers

1996 Jeep Grand Cherokee electrical problem


Check the center brake light assembly. There are 3 bulbs and if one is out it will give you the bulb out warning. This is frequently missed as if the center bulb is out it is easy to overlook.

Do yourself a favor and replace all 3 when you are there as the dissassembly/assembly is not that easy on 96-98 Grands

Nov 06, 2008 | 1996 Jeep Grand Cherokee

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