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#40230 - 12/03/08 11:11 PM Low Coolant Light (Always On)
rocketman Offline
Member
Registered: 12/17/02
Posts: 241
Loc: Rockledge, Florida
Within the past week, my Low Coolant Light has started to come on as soon as I start my '98 GP, and it stays on. After reading the following additional info, thanks in advance for any thoughts on why this might be happening.

Here's the additional info.

I got a new daily driver, so the car has been sitting a lot over the past 4 or so months.

I installed a new Optima Red Top battery within the past month.

I installed new radiator hoses, and serviced the cooling system within the past year.

No cooling system leaks, and the fluid level is fine.

This is a high mileage car, but I have maintained it very well.

No trouble codes are being thrown.

Thanks in advance for any ideas.
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#40231 - 12/03/08 11:17 PM Re: Low Coolant Light (Always On)
Blackarrow98GP Offline
Member
Registered: 06/29/06
Posts: 3618
Loc: CT, U.S.A
Try removing and cleaning the Low Coolant Level Sensor in the radiator first. If the light doesn't stay out, replace the sensor.
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#40232 - 12/03/08 11:36 PM Re: Low Coolant Light (Always On)
20gtp02 Offline
Member
Registered: 04/13/06
Posts: 6709
Mine has being doing this for months. Cleaned twice.
It is just constantly on now. And I didn't want to spend $60 for the stupid sensor. I just deal with it until I get one from Ed or something.
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2002
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#40233 - 12/03/08 11:44 PM Re: Low Coolant Light (Always On)
palsut Offline
Member
Registered: 08/31/06
Posts: 4021
Loc: Batavia, Ohio
Any write-up for how to remove job? My winter beater have been doing that. It is weird. When I brought winter beater in April 2008. It was very cold outside with snow around. The low coolant light went on. In summer season, the light is gone. Now, the winter is back so the light is back too. :rolleyes:
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#40234 - 12/03/08 11:49 PM Re: Low Coolant Light (Always On)
20gtp02 Offline
Member
Registered: 04/13/06
Posts: 6709
Not sure if there is a write up or not, but there is a metal clip, like a U shape. Take that off and pull the sensor out. It will be snug, has two o-rings on it to help keep the coolant form coming out.

Take the headlight out, more access. Here is a pic of me using plumbers pliers to get it back in, with the new bigger orings.
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2002
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#40235 - 12/04/08 12:00 AM Re: Low Coolant Light (Always On)
ordonez1307 Offline
Member
Registered: 04/18/05
Posts: 8901
Loc: Bradenton, FL
Mine has been on for years. I just ignore it.
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Corey Smith
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#40236 - 12/04/08 12:07 AM Re: Low Coolant Light (Always On)
palsut Offline
Member
Registered: 08/31/06
Posts: 4021
Loc: Batavia, Ohio
Okay, is that from pass. side?
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#40237 - 12/04/08 12:10 AM Re: Low Coolant Light (Always On)
20gtp02 Offline
Member
Registered: 04/13/06
Posts: 6709
Yup.
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2002
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#40238 - 12/04/08 04:05 PM Re: Low Coolant Light (Always On)
Zalfrin Offline
Member
Registered: 04/08/08
Posts: 2647
Loc: Iowa City, IA
I don't have any experience with this issue, but one thing that came to mind: Did you remember to bleed the air out?
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'99 GTP, L36 bottom, XP cam, Headers, 3.29 gears, FWI, Powrtuner
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#40239 - 12/05/08 03:45 PM Re: Low Coolant Light (Always On)
The Guz Offline
Member
Registered: 10/04/08
Posts: 294
Loc: Lawndale, CA
This is the most common picture floating around. The sensor is on the passenger side of the radiator. I had to clean mine once since the coolant gumed up on the terminals. It happened again when I changed my LIM gastkets. I would just a get a new one.
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99 Grand Prix GT ER Rockers|HV3|HV TB|Borla Catback|Black Koblenz|GMPP Lowering|GMPP Handling www.fquick.com/The_Guz
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#40240 - 12/07/08 01:14 PM Re: Low Coolant Light (Always On)
zuulmusic Offline
Member
Registered: 04/22/05
Posts: 3075
Loc: Cleveland, OH
Mine's on too. The most annoying thing is people in my car telling me my coolant is low.
... "and your ABS light is on. and what does 'trac off' mean?"

gotta be a way to spoof it.
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#40241 - 12/08/08 10:59 AM Re: Low Coolant Light (Always On)
ThunderBat Offline
Member
Registered: 03/11/04
Posts: 5176
Loc: Virginia
mine goes off and on all the time...but since the car rarely gets over 180 then I know there is no way the coolant is really low (not to mention checking the radiator multiple times)
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Thoughts from the Highway of Life www.tobthebat.wordpress.com
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#40242 - 12/08/08 11:04 AM Re: Low Coolant Light (Always On)
Blackarrow98GP Offline
Member
Registered: 06/29/06
Posts: 3618
Loc: CT, U.S.A
Aside from a gummed up/bad sensor or low coolant level, the only other things that would make the light stay on would be a short to ground in the yellow/blk wire, or a bad gauge cluster.
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#40243 - 12/08/08 03:53 PM Re: Low Coolant Light (Always On)
quark_man Offline
Member
Registered: 11/11/02
Posts: 469
Loc: Alberta
I pulled the connector off the damn sensor, buahahahaha! Now it can rot.
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#40244 - 12/08/08 10:38 PM Re: Low Coolant Light (Always On)
rocketman Offline
Member
Registered: 12/17/02
Posts: 241
Loc: Rockledge, Florida
Thanks for all the replies. I'm wondering if maybe the sensor got gummed up because the car has been sitting so much. I really need to drive it at least once a week I think, just to keep the gremlins away.
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