Q: My hot temperature light is blinking and the temperature is below the C mark. Is it safe to drive home?

asked by on

I was driving home from work when the temp gage dropped to below the c and the hold light started flashing. Am I able to drive it home?

My car has 94086 miles.
My car has an automatic transmission.

Hi there. The coolant temperature sending unit is malfunctioning and sending the vehicle the wrong information or the gauge on the dash has failed. The sending unit could have burned inside causing the computer to think that the engine is overheating. Also, the sending unit could have failed making the gauge read cold only and not register. The gauge in the dash could have failed causing the meter to register cold all the time. To see if your engine is overheating or not, open you hood and feel the upper radiator hose. If the hose is very hard and very hot to the touch, then the engine may be overheating and the gauge is malfunctioning. If the upper radiator hose can be squeezed a little and it not that hot, but has some heat to it, then the engine is operating normally and the temperature sending unit (sensor) has failed. If you hear any gurgling sound, then the engine is overheating to the point that its boiling the coolant. If there is no sound, then the engine is not boiling the coolant. I recommend seeking out a professional, such as one from Your Mechanic, to help you with your coolant sending unit and indicator lights.

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. My hot temperature light is blinking and the temperature is below the C mark. Is it safe to drive home?

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: Accidentally put E85 gas in my car

Modern cars have the capability to adapt to the use of lower and higher octane fuels, such as using 87 in a car that takes 91. E85 is different from gasoline as it is 85% ethanol and 15% gasoline. Normal...

Q: Dashboard lights gauges radio

Without knowing the exact model, it is hard to make an accurate assessment. All of the main power distribution comes through fusible links so these will need to be checked. It is possible one of these links has burned and...

Q: Car has trouble starting when it's cold

You may have an issue with your battery. Batteries are measured in cold cranking amps which is the amount of amperage the battery can produce at 0 degrees. If the cold cranking amps of your battery are not up to...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...