P0116Toyota TundraYears: 1996 - 2026
Engine Coolant Temperature (ECT) Circuit Range/Performance
Reviewed by ASE Certified Technician
What does this mean?
Code P0116 means the ECT sensor reading does not match the expected warm-up curve or operating temperature range.
Disclaimer: This diagnostic code is part of the standard OBD2 system and can apply to Toyota Tundra models manufactured from 1996 to 2026. However, please note that the presence of this specific code depends on your vehicle's exact engine configuration, options, and production year.
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Common Causes
Faulty Engine Coolant Temperature (ECT) sensor
Faulty or stuck thermostat
Coolant leak or low coolant level
Damaged, chafed, or broken wiring harness
Symptoms to Watch For
- Check Engine Light is illuminated
- Decreased fuel economy
- Difficulty starting the engine
- Engine stalls when cold
- Engine overheating