Skip the auto shop - Our mechanics make house calls

Q: Cooling temperature sensor light on.

asked by on

The cooling temperature sensor light is coming on.

A: Coolant temperature sensors generally will ...

Coolant temperature sensors generally will not record fault codes in the engine computer or turn on the Check Engine light unless they completely fail by either a short or open circuit. When the coolant temperature sensor fails completely you will either have some drivability problems such as reduced power of lower fuel economy (open circuit) or the cooling fan will run continuously even when the engine is cold (short circuit). In my experience what often happen is that the coolant temperature sensor will still read within its range but will not read correctly as it ages. This will not record any faults but will cause the temperature gauge to read incorrectly. Now the first thing to check is to see if the coolant temperature sensor is reading correctly and that the cooling system is operating correctly (ie. the thermostat is operating correctly). You may want to enlist the help of a mechanic, such as one from YourMechanic, to run a performance check on the cooling system and compare actual coolant temperature versus actual coolant temperature. This will narrow down the cause of the temperature reading.

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

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Do I need to replace the alternator?

You will need to have the alternator replaced. Older versions of alternators were serviceable at one point, and some still are. Todays parts are starting to be designed to be non-serviceable. You may find a mechanic that can service your...

Q: Vehicle is shaking when braking from above 35 mph

Hi there. From what you're describing, the squeaking noise is common with a brake pad on the front of the vehicle that is wearing down to the wear indicator mark that is making contact with the rotor. This could be...

Q: It pops when you start going and when stopping.

This is a common sign of a failing CV joint. A CV (Constant Velocity) joint is a shaft that connects the transmission to the wheels, essentially transferring the power from the drive train directly to the wheels. The CV joint...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.