P0116 — Engine Coolant Temperature Sensor Circuit Range/Performance
Category: Powertrain Severity: Medium
Updated:
DTC code P0116 means: Engine Coolant Temperature Sensor Circuit Range/Performance. It falls under the "Powertrain" category, with an estimated severity of Medium. Common causes include thermostat stuck open, out-of-range coolant sensor and low coolant level; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Thermostat stuck open
- Out-of-range coolant sensor
- Low coolant level
- Air in the cooling system
Symptoms
- Engine slow to warm up
- Weak cabin heat
- Higher fuel consumption
- Check engine light
How to diagnose it step by step
- Check coolant level and bleed air.
- Log temperature during warm-up.
- Check the thermostat.
- Compare the sensor with a thermometer.
How to fix it
If the engine takes a long time to reach operating temperature, the thermostat is the main suspect. If it warms up fine but the reading is inconsistent, replace the sensor.
Estimated repair cost
Sensor: $50–150 installed. Thermostat: $150–400.
Frequently asked questions
What does DTC code P0116 mean?
Engine Coolant Temperature Sensor Circuit Range/Performance.
Is code P0116 serious?
Severity Medium. Not urgent, but worth diagnosing to avoid bigger damage.
Can I keep driving with code P0116?
Yes, you can drive while monitoring temperature.
Related codes
P0115 P0117 P0118 P0113 P0112 P0110 P0120 P0121 P0122 P0123
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