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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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Repairs418Labor995Torque7006Fluid18DTC3798Battery2Maintenance0Recalls14
P0339high severityPowertrain

Crankshaft Position Sensor A Circuit Intermittent

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

What this code means

The crankshaft position sensor signal is dropping out intermittently. This can cause random stalling, hard starts, and misfire codes.

Symptoms

  • Intermittent stalling
  • Hard starting
  • Random misfires

Common causes

  • Loose CKP sensor connector
  • Chafed or intermittent wiring
  • Failing crankshaft sensor
  • Damaged reluctor ring

Diagnostic steps

  1. Scope CKP signal while driving
  2. Wiggle-test sensor harness
  3. Inspect connector and pins
  4. Check reluctor ring condition
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