P0186
PowertrainTemperature Sensorlow severityFuel Temperature Sensor B Circuit Range/Performance
What P0186 Means
The second fuel temperature sensor reads within limits but its value doesn't make sense compared to other sensors. Often a slow-responding or drifting sensor.
Symptoms
- Check engine light on
- Inconsistent fuel trim
- Reduced performance
Common Causes
- Drifting fuel temperature sensor B
- Wiring resistance issues
- Corroded connector
- Faulty PCM
Diagnostic Steps
- Scan and compare sensor readings
- Compare fuel temp to coolant and intake temps
- Inspect wiring and connector
- Replace sensor if reading is skewed
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