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Coolant Service Light

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Is It Safe to Drive With the Coolant Pressure Light On?
Your Coolant Pressure Light comes on when your engine is overheating due to insufficient coolant. So, can you drive safely with your...
Symptoms of a Bad or Failing Coolant Level Sensor
If the Coolant Light stays on permanently, there is low coolant, or the engine is overheating, you may have to replace the coolant level sensor.
Symptoms of a Bad or Failing Heater Control Valve
Common signs include the heater not working, coolant leaking from under the engine, and no voltage across the heater control valve.

Related questions

rough idle
Hello. I would need to know which misfire codes you are getting to know for sure what is going on. Most of the time on this vehicle if it is a single cylinder misfire then it may be as simple...
No coolant in the reservoir. Seen low coolant message. I added 2 quarts of 50/50 coolant. Still getting the message. How much coolant doe it need?
Hi there. For the coolant light to go out, you would need to have the coolant between the low line and the full line for the light to go out. If the coolant is low and keeps on being low,...
Message board displays low coolant but I just refilled last week?
Hello, and thank you for writing in. The first place to start is by checking the level of the coolant both in the coolant reservoir and in the radiator. Low coolant means you do in fact have a leak. If...
VEHICLE ISSUES
German luxury cars built in this century are very complicated. They have multiple electronic control units for different functions, one for the engine, one for the transmission, one for the brakes and half a dozen more for various body functions....
Check engine light flashing, sucking fuel, procrastinating when accelerating...
This is a very odd set of symptoms. I would suggest ruling out any fuel-related issues as the poor fuel economy and lack of power could be related to faulty sensors like the throttle body sensor, mass air flow sensor,...
Coolant light is on almost always
If you have the GS model, that means you have the supercharged version of the 3.8L engine. The naturally aspirated 3.8L has problems with the intake gasket leaking, which results in coolant/oil intermix. However, the supercharged version is not as...
Car still overheating, and hissing, even after changing the coolant.
Hi there. Some coolant leaks can be hard to find and may only appear when the system is under pressure. If you are getting a hissing noise it is possible that you have a leaking hose, but most of the...
Coolant keeps leaking
Hello. The motor that is in your car (https://www.yourmechanic.com/cars/pontiac/grand-am) is known to leak antifreeze from its lower intake gasket. You will usually never see any antifreeze on the ground when/if this happens. Replacing the lower intake gasket should solve this...
Coolant reservoir dash light.
The reservoir could have a crack in it or the hoses to the reservoir could have the clamps loose or the hose could be split causing the coolant leak. If there is a coolant leak, then the coolant pressure will...
Thermostat is not reading the temperature of the vehicle and doesn't allow the A/C to work because of this. 2006 Chevy Impala
Hi there - it sounds like there is still a coolant leak independent of the radiator which needs attention. It is also possible that there is an air bubble in the engine which may need to be bled (air bubbles...
Coolant temperature too high - 2011 Audi A7 Quatro
It sounds like the engine thermostat, a device that reduces coolant flow until the engine has reached it's operating temperature, is not opening. This prevents hot coolant from getting to the the radiator where it is cooled. If the dealer...
What does 'Top Up Coolant' light mean?
This indicates the engine cooling system is low on coolant and will need to be topped off. The system should be inspected for leaks to ensure there are no other issues causing the engine coolant level to drop. Please note:...
P0128 code, but coolant is full
This is most likely caused by the thermostat partly stuck open. The coolant sensor would need to be tested to make sure it is not bad, though. I would test the thermostat at the housing with a temperature tester, and...

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