P0115Honda PassportYears: 1996 - 2026
Engine Coolant Temperature (ECT) Circuit Malfunction
Reviewed by ASE Certified Technician
What does this mean?
The ECT sensor measures coolant temperature to help the PCM adjust fuel injection and ignition timing. Code P0115 indicates a general circuit malfunction.
Disclaimer: This diagnostic code is part of the standard OBD2 system and can apply to Honda Passport 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
Damaged, chafed, or broken wiring harness
Corroded or loose electrical connector
Faulty or stuck thermostat
Symptoms to Watch For
- Check Engine Light is illuminated
- Difficulty starting the engine
- Decreased fuel economy
- Rough or unstable idle
- Engine stalls when cold
- Cooling fan not operating