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Coolant Service Light

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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.
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 Coolant Pressure Light on? The short answer is that it...

Related questions

Question
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...
Question
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,...
Question
Smoke started coming out of my Jeep engine. I stopped driving, had a look, I believe my serpentine drive belt has snapped.
Several faults can cause your serpentine belt to snap. If the serpentine belt snapped it should be fairly easy to see. The belts fail for many reasons but the most common would be a failed belt, seized accessory, belt tensioner...
Question
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...
Question
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....
Question
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...
Question
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...
Question
Coolant keeps leaking
Hello. The motor that is in your car 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...
Question
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...
Question
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:...

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