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: P0193 in Ford fiesta durateq

Hello. Trouble codes P0191 and P0193 are the trouble codes for issues with the fuel rail pressure circuit range, reading excessively high. It may be possible that the fuel rail sensor or circuit is having an issue. I would test...

Q: ABS, fuel, and temperature gauge lights on when start car

Hello. I think that you should have your alternator retested by a different mechanic. The alternator cannot possibly be tested correctly with a dead battery. If the vehicle is not running, the alternator will not do anything. If the battery...

Q: 3.7 engine temperature gauge runs between middle to 3/4, leans a little more to 3 /4 never over is this normal

Hi there, thanks for writing in about your 2007 Hummer H3. The temperature should typically rest more towards the middle of the gauge. You should have the vehicle tested to see if the engine is running hot, or if it...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.