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2015 FORD F-150
3.5L V6 EcoBoost•RWD•AUTOMATIC•gas•turbo
14 active safety recalls on this vehicle — view recalls
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Repairs418Labor995Torque7006Fluid18DTC3796Battery2Maintenance0Recalls14
P0189low severityPowertrain

Fuel Temperature Sensor B Circuit Intermittent

on 2015 Ford F-150 3.5L V6 EcoBoost · RWD

What this code means

The second fuel temperature sensor signal is dropping out intermittently. Usually a wiring or connector problem rather than the sensor itself.

Symptoms

  • Check engine light on
  • Intermittent rough running
  • Erratic fuel trim

Common causes

  • Loose or corroded connector
  • Chafed or damaged wiring
  • Failing fuel temperature sensor B
  • Faulty PCM

Diagnostic steps

  1. Scan for stored codes
  2. Inspect connector and harness
  3. Wiggle-test wiring while watching signal
  4. Replace sensor if it drops out
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