View Full Version : Add Coolant light keeps coming on..


tripps
08-26-2008, 02:45 PM
Like the title says, that damn light keeps coming on, a couple of days ago i turned on the car and took off the radiator cap to add more coolant but then collant level only went downan inch, the reservoir was completely full also. I waited about 15 minutes while revving up to 2000 rpms occassionaly. The temp gauge has also never gone above 210 since the light started coming on 3 weeks ago. Anyone have any advice? Thanks

BlackScreaminMachine
08-26-2008, 03:22 PM
CHeck level, if its up on coolant, then its a sensor. LT1's were famous for this.

badazz99ta
08-26-2008, 05:21 PM
happened on my lt1 and my ls1. i just unpluged it and kept an eye on it.

ZTwentyAteU
08-26-2008, 10:07 PM
its common..just ignore. lol

samson_420
08-26-2008, 11:47 PM
Mine has not freaked out, yet.

I pulled the sensor when I was doing a flush. The sensor had all kinds of crusty crap in it. I just cleaned it out. From what I have heard on here, that helps also.

wssix99
08-27-2008, 07:50 AM
Same thing just happened to my '99. Time for a new coolant level sensor.

tripps
08-27-2008, 12:39 PM
Yeah I figured it was a sensor since i have kept an eye on the temp gauge mainly and it has acted normal, I'll probably just unplug it or try cleaning it for now. thanks for the help.

stevegrizzle
08-27-2008, 01:28 PM
where is the sensor located?

Red99TransAm
08-27-2008, 04:17 PM
Same exact thing here. I was just getting ready to post it. I think the sensor is on the passenger side on the bottom isn't it? How much are they?

2001NBMZ28
08-27-2008, 04:28 PM
Sensor is located a few inches below the radiator cap. GM PN is 10096163 and dealership list is $65 so I'd look elsewhere. My car didn't come with one, not sure what year GM took them off the F body.

samson_420
08-27-2008, 05:20 PM
Anyone try cleaning theirs yet? I wonder if the light will go away after a cleaning.

stevegrizzle
08-27-2008, 05:26 PM
I want to try. when I bought my car there was crusty stuff all in on the coolant level sitck and I bet that is the culprit. I flushed the coolant but I bet some good cleaning would do wonders.

wssix99
08-28-2008, 04:01 PM
Anyone try cleaning theirs yet? I wonder if the light will go away after a cleaning.

It probably depends on the situation. I have read of others having fouled sensors.

My bad sensor came out perfectly clean. Here's an interesting article: http://www.wellsmfgcorp.com/pdf/Counterpoint2_2.pdf It does mention that sludge can cause coolant sensors to mis-read, however I think mine was a thermal failure.

I'm assuming our level sensors are probably just a simple on/off temperature sensor set to a very very low temperature? If so, that would be in line with how mine failed. It would start to work when the engine reached a certain temperature. Over time, that "happy" temperature rose to a higher and higher point until it wouldn't work at all.

Nauty99SS
08-28-2008, 08:16 PM
Same thing just happened to my '99. Time for a new coolant level sensor.

same for my 99 .. also hooked a rag on the spring thingy while cleaning .. and that son-of-a-bitch popped off and blew coolant every where the next time i drove it :mad:..now i always check it when i have the hood up :D