Low Coolant Light

[40th Sonic GT]

My low coolant light comes on sometimes when I start my car and stays on. My coolant was recently changed and is never low. What might be causing this?

 

[ss93cobra]

My low coolant light comes on sometimes when I start my car and stays on. My coolant was recently changed and is never low. What might be causing this?

Either low coolant in the reservoir, or the sensor is dead

 

[RacEoHolic330]

more than likely a crappy sensor..the stock gauges aren't exactly known to be reliable. My coolant light comes on from time to time and its not even plugged into anything.

 

[40th Sonic GT]

Is it hard to change the sensor?

 

[ss93cobra]

nope. It's part of the cap the is on the overflow reservoir.

 

[sunil6784]

Check the overflow jug...thats where the sensor gets it reading from i think. There should ALWAYS be coolant in the overflow jug. If not, top it off more than the indicator line, because chances are, your radiator might be a little low too.

 

[LB0193]

unplug the sensor, or get a new one....I was sick of mine going on so I just unplugged it and taped it off, its useless anyway

 

[HISSIN50]

Also remove the sensor and clean the contacts. If the contacts are full of poo, they cant conduct (when the coolant level is as high as the prongs on the sensor, the electrolyte closes the dynamic connection between the two prongs. No light). When the prongs get dirty, the connection is bad and the sensor thinks the level is low.

Good luck.