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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
P0166moderate severityPowertrain

O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 3)

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

What this code means

The PCM detects no activity from the bank 2, sensor 3 oxygen sensor. The signal is flat or unchanging when it should be varying.

Symptoms

  • Check engine light on
  • Poor fuel economy
  • Failed emissions test

Common causes

  • Faulty oxygen sensor
  • Open circuit in wiring
  • Corroded connector
  • Faulty PCM

Diagnostic steps

  1. Scan for stored codes and freeze frame
  2. Check sensor signal activity in live data
  3. Inspect wiring and connector for opens
  4. Replace oxygen sensor if inactive
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