Skip the auto shop - Our mechanics make house calls

Q: Coolant temperature increase, service hybrid light on

asked by on

Hi. There is something going on with the coolant temperature in my car. It is usually 187, but these days it reads 209. While I was driving, the dashboard showed the service hybrid light illuminated, along with the coolant temperature. There was no overheating light on though. What could be causing this? Thanks.

A: Hello. If the coolant is getting hotter tha...

Hello. If the coolant is getting hotter than normal it will also affect the hybrid system. If the coolant is low then this will occur. If the coolant level is fine then it is more than likely a weak water pump or a failing thermostat. These are both common. I use an infrared thermometer to check the temperatures to see if the thermostat is failing. If it is fine then the coolant flow needs to be checked to see if the pump is weak. If you want to have this looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose this.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Automatic transmission isn’t working right and I don’t know the problem

It would help to further pinpoint the Power Transfer Unit (PTU) problem with knowledge of what your previous issues were at 30,000 miles and if they were similar to what you are experiencing now. It is also noteworthy that your...

Q: I BELIEVE MY AIR COMPRESSOR WENT OUT ON MY2012 BUICK LACROSSE CAUSE AIR WILL NOT COME ON, IF I CONTINUE TO DRIVE IT LIKE THAT WILL

I am going to assume the air compressor you are speaking of is your air conditioning compressor. If this is correct, the answer is your A/C (air conditioning) has nothing to do with your car overheating. There are components in...

Q: car won't start.

When a vehicle will not start it needs three things. It needs proper air/fuel mix and compression then ignition to ignite the mixture. If any one is missing or is not correct, it will not start and run. With this...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...