How do I reset the low coolant light

Asked by Oct 09, 2015 at 05:40 PM about the 2001 Buick Regal LS

Question type: Maintenance & Repair

Reset low coolant light

7 Answers

7,260

Major, major PITA. They work by using the coolant to conduct a very small current between the little pickup inside the radiator. If the coolant (anti-freeze) gets old and contaminated it puts a coating on the probe ... thus blocking the signal for the coolant level' You can pull the probe out (a job not for the meek) and clean it or you can just live with it because even putting fresh coolant may not make the alarm go away

4 out of 4 people think this is helpful.
56,855

The sensor is clamped to the radiator about 4 inches below the filler neck. There's a small wire clip that holds it in place. You can carefully pry the clip off to remove the sensor. But first, unplug the sensor and see if the light goes out. If so the sensor is bad. Unless you just had the radiator replaced. Then its possible that the hole for the sensor has not been drilled out and the sensor is dry. If the sensor proves to be bad, replace it. After you replace the sensor it may take a couple of days for the light to go out. The same is true after the cooling system is serviced. GM issued a service bulletin about this. It's normal, believe it or not! As Tom said, these sensors are troublesome!! HTH. -Jim

4 out of 4 people think this is helpful.
19,235

fill it up first ..bleed air out..if its still on replace the sending unit.

2 out of 2 people think this is helpful.
7,260

Kelly ... The sensor is nothing more then a piece of wire (anode) and is probably still good. If you get some Brasso it will polish up like brand new. To get that sucker out I was forced to remove the battery for access ... then they have this spring retainer that requires a minimum of 3 hands to remove while doing tricks with your wrist that a magician would envy. Getting it back in requires real dexterity ... the rectangle assembly is a press fit and an "O" ring (actually a rectangle ring) is compressed while your other hand (holding that square spring retainer) must manover under the hand retaining the assembly. I launched the spring twice before getting it secured ( probably because I'm old ). Beware that it is very secure because if it's not completely flat ... as soon as your radiator builds up any pressure it will become a projectile and shoot itself against the battery. I have assembled transmissions in almost total darkness but that little POS requires the dexterity of Houdini based on the visibility and the tiny space it's in. BTW you can't unplug it to eliminate the alarm ... reason being if you unplug it then there is no conductivity through the coolant and it thinks you have "low coolant" You can however put a 2000 Ohm resistor across the plug so it thinks it's reading coolant

2 out of 2 people think this is helpful.
56,855

Not true about unplugging the sensor and the light not going out. It will go out because the sensor completes the circuit to ground to turn the dash light on. By unplugging the sensor the ground path for the bulb is broken so it can't come on. HTH. -Jim

7,260

Interesting ,,, I unplugged the sensor on a 2002 Grand Prix and it stayed on until the resistor

2 out of 2 people think this is helpful.
56,855

Then there was a short in the wiring or instrument cluster. I unplugged the sensor on my '00 Grand Prix and the light went out. That's how I knew the sensor was bad. Both yours and mine use the same sensor. -Jim

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

  • low coolant light 3 answers

    Ever since I changed the coolant, the low "low coolant" light came on intermittently, but stays on all the time now, even though the coolant level is okay. How do I correct the problem.

    1999 Buick Regal 4 Dr GS Supercharged Sedan

    -

    Maintenance & Repair

  • How do I reset the Low Tire indicator? 7 answers

    Right front tire pressure was corrected but the low tire indicator light will not go out. (Was told it would after driving it for a while.) What do I have to do to reset it? Sandi

    2002 Buick Regal

    -

    Maintenance & Repair

  • Low Tire Light 1 answer

    The Low Tire light is on, I found the fuse box, but there is no reset button to recalibrate the system. Please helpl

    2000 Buick Regal GS

    -

    Maintenance & Repair

  • Low Coolant Sensor on 1999 Buick Regal GS (Supercharged) 3800 stays on, but no low coolant in system. Where is the sensor on the GS? 1 answer

    My 'mechanic' stated I needed to change the Coolant Reservoir on my 1999 Buick Regal GS (Supercharged,) as he says there is a 'float' in the rear of the overflow tank that sticks after awhile. I do...

    1999 Buick Regal 4 Dr GS Supercharged Sedan

    -

    Maintenance & Repair

  • why does yhe coolant light stays on when there is no problem 1 answer

    low coolant light stays on when there is no problem?

    1994 Buick Regal 4 Dr Gran Sport Sedan

    -

    General

Regal

Looking for a Used Regal in your area?

CarGurus has 11,280 nationwide Regal listings starting at $1,995.

ZIP:

Search Buick Regal Questions

Buick Regal Experts

#1 FordNut
FordNut
Reputation 380
#2 Tom Demyan
Tom Demyan
Reputation 360
#3 dvigano
dvigano
Reputation 340
View All

Related Models For Sale

Used Chevrolet Impala
998 Great Deals out of 36,811 listings starting at $1,800
Used Chevrolet Malibu
1,154 Great Deals out of 80,725 listings starting at $2,495
Used Chevrolet Camaro
631 Great Deals out of 39,687 listings starting at $2,995
Used Honda Accord
1,264 Great Deals out of 78,832 listings starting at $969
Used Nissan Maxima
516 Great Deals out of 25,500 listings starting at $1,500
Used Ford Mustang
719 Great Deals out of 39,136 listings starting at $1,000
Used Toyota Camry
1,525 Great Deals out of 101,602 listings starting at $700

Used Cars For Sale

2017 Buick Regal For Sale
5,009 listings starting at $20,286
2016 Buick Regal For Sale
66 Great Deals out of 2,492 listings starting at $16,459
2015 Buick Regal For Sale
20 Great Deals out of 633 listings starting at $14,050
2014 Buick Regal For Sale
16 Great Deals out of 491 listings starting at $11,283
2013 Buick Regal For Sale
35 Great Deals out of 876 listings starting at $7,995