Coolant light stays on

replace the temperature sending unit

I'm assuming you're talking about the "low coolant" light. Unplug the coolant level sensor. It's on the plastic coolant recovery tank. If the light goes off, the sensor is bad. Replace it. Hope that helps! Jim

I already tried disconnecting sensor. The light stays on so I believe it is not sensor.

Not the coolant temperature sensor, the coolant level sensor. They're two different things. The coolant level sensor is in the plastic coolant recovery tank, not the engine. Now if you unplugged the correct sensor and the light remains on you have a short in the wiring going to the coolant level sensor or the instrument cluster is bad. Hope that helps! Jim

Thank you! The light went off when disconnected. Expect sensor to come in tomorrow to replace.

Awesome! Very glad to hear that!! Thanks for letting us know! With the new sensor the light may come back on for a few days then go out like it's supposed to. This is normal. Now would be a good time to remove and clean the coolant recovery tank too, if you haven't done so already. You're welcome. Glad to help! Jim