OBD-II Generic Error Code P0116: How to Fix It

Q: Can I drive with code P0116?

It is not recommended. The engine may run poorly, overheat, or fail emissions. Address it promptly to avoid further damage.

Q: How much does it cost to fix P0116?

DIY cost is around $20-$50 for a new ECT sensor and coolant. Professional repair typically ranges from $100 to $250 including diagnosis and labor.

Q: Will clearing the code fix it?

Clearing the code with a scanner may turn off the check engine light temporarily, but if the underlying problem persists, the code will return.

Q: What are symptoms of a bad ECT sensor?

Symptoms include poor fuel economy, hard starting (especially cold), black smoke from exhaust, overheating, and erratic temperature gauge.

Q: Can a thermostat cause P0116?

Yes, a stuck-open thermostat can cause the engine to run cooler than normal, triggering a P0116 code. Test or replace the thermostat if the sensor checks out.

Abstract

This diagnostic trouble code P0116 indicates that the engine coolant temperature (ECT) sensor is reporting a reading outside of the expected range or performance parameters. This can cause poor engine performance, hard starting, and increased emissions.