Q: Cooling temperature sensor light on.

asked by on

The cooling temperature sensor light is coming on.

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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Cooling temperature sensor light on.

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: Why did my car shut off when I put it in reverse

It is possible that this could have been a fluke issue. However if this is not the case I would recommend having your transmission inspected by a qualified professional to determine if everything is functioning properly.

Q: Engine clicks but won't start.

Hi, thanks for writing in. Your car is well known for having faulty starter motors. Since the battery is fine, it is very likely the your concern is due to a bad starter. Unfortunately, part of the intake manifold needs...

Q: Faulty speed sensor causing car to stall.

If you are referring to P0320 - Ignition/Distributor Engine Speed Input Circuit code, then the most common cause of the problem is the crankshaft position sensor. This sensor controls ignition timing of the engine and when it fails the computer...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...