OBD-II FAULT CODE
P0189
Fuel Temperature Sensor B Circuit Intermittent
Meaning, symptoms, likely causes, diagnostic checks and repair guidance for P0189.
- Check Engine light
- Poor drivability or reduced fuel economy depending on fault
- Loose connector
- Moisture/corrosion
- Harness vibration fault
- Scan all modules and record freeze-frame data before clearing codes
- Check battery voltage and related fuses
- Wiggle-test harness while watching live data
- Inspect for water intrusion/corrosion
- Clean/secure connector and repair damaged harness
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Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.