How to reset low coolant warning?
The reed switch may be stuck. My 98 Grand Am coolant tank ran dry last week when my lower intake manifold gasket started to leak. Fixed the leak and refilled the tank only to see the coolant light still on. Tapped the switch/sensor on the bottom OS the tank with a rubber mallet so the magnetic float could loosen up and float back up. Sure enough, turned on the ignition and light was out.
There is no reset button or wsitch Check overflow tank under the hood and if low add coolant. If the coolant level is ok it may be the sensor on the bottom of tank is dirty with sluge. This sensor is the one which gives the low coolant indication. Remove tank and flush it out several times with clean water and re-install, refill tank with coolant to proper level. Answer It should go off when…
Why would the low coolant warning light occasionally come on in a 1998 Cavalier 2.2 when the coolant is not especially low?
you can't reset it, fill your coolant up full, both rad and overflow. the light will go out. if it is still on when everything is full, then your coolant sensor is broken or unplugged. if you light goes off then comes on again and your coolant is low, then you have a leak. if you have a 3400 engine in your lumina common leaks are intake gaskets, waterpumps, and head gaskets.