Low coolant light

Jan 29, 2006 5 Replies
J

I had the low coolant level light come on in my car about two weeks ago. I was close to home so I just drove it home.



When I got there, the surge tank was empty, so I filled it with a bottle of 50/50 I had in my trunk. Then I noticed there was a pretty decent leak coming from the heater inlet hose.



I tried to change the heater inlet hose, but it turned out that the plastic (!) pipe that was the inlet of the heater core was the part leaking, not the hose.



So, I replaced the heater core and now the system is full and there are no leaks......



BUT THE LOW COOLANT LIGHT IS STILL ON!!



What's going on?



Thanks!


Vote
Twitter Facebook LinkedIn
J

Are you saying the overflow tank is full and the light is on? Not clear. If so then you have a problem with the coolant level sensor circuit.

Otherwise, you may not have flushed out the bubbles and airpockets - fill it up once more and track the level closely. If it goes down again, you probably have another leak to chase down.

Vote
Twitter Facebook LinkedIn
�

Your 1992 Pontiac Grand Am has a float sensor in the overflow tank. Sometimes it sticks. Give it a whack.

Vote
Twitter Facebook LinkedIn
J

It's a 98 Grand Am, sorry that I failed to mention that.

The overflow tank is full and the light is on.

When I unplug the sensor electrical connector on the surge tank, the light obviously stays off.

I'll try the "give it a whack" method and see if that helps. I suppose it is a stuck or otherwise malfunctioning sensor.

Thanks.

Vote
Twitter Facebook LinkedIn
R

Try to clean this sensor, it's locked by dirt etc. in the on position.

Regards,

Ralf

Vote
Twitter Facebook LinkedIn
J

Looks like the "whack" did it!!

Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required