OBD-II FAULT CODE
P0116
Engine Coolant Temperature Circuit Range/Performance Problem
Meaning, symptoms, likely causes, diagnostic checks and repair guidance for P0116.
- Check Engine light
- Poor drivability or reduced fuel economy depending on fault
- Temperature gauge abnormal
- Overheating or slow warm-up possible
- Low coolant
- Faulty thermostat
- Coolant temperature sensor/wiring fault
- Cooling fan issue
- Signal out of expected range
- Scan all modules and record freeze-frame data before clearing codes
- Check battery voltage and related fuses
- Check coolant level only when engine is cool
- Compare scan-tool temperature to actual temperature
- Compare live data to expected value and inspect mechanical operation
- Repair leaks, replace thermostat/sensor/fan component after confirming fault
- Repair mechanical cause, clean/replace sticking actuator, or replace sensor after confirmation
Related Codes
Need more help?
Search manuals, wiring diagrams and technical service bulletins.
Not sure what to do next?
Get step-by-step instructions and professional repair information.
Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.