C1774: Coolant Temp Out of Range
MediumChassisChassis Electronics
What does C1774 mean?
C1774 is a diagnostic trouble code indicating "Coolant Temp Out of Range". This code relates to your vehicle's chassis electronics and should be diagnosed to determine the root cause. The severity level helps indicate how urgently this should be addressed.
Common causes
- Stuck thermostat (open or closed)
- Low coolant level or coolant leak
- Failed coolant temperature sensor
- Faulty water pump
- Blocked radiator
What should you do?
Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.
Get a diagnosis for YOUR car
Code C1774 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.