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2019 FORD F-150
3.5L V6 EcoBoost•RWD•AUTOMATIC•gas•turbo
9 active safety recalls on this vehicle — view recalls
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Repairs418Labor1009Torque7006Fluid18DTC3818Battery2Maintenance0Recalls9
P0451low severityPowertrain

Evaporative Emission System Pressure Sensor/Switch Range/Performance

on 2019 Ford F-150 3.5L V6 EcoBoost · RWD

What this code means

The PCM detected an erratic or out-of-range signal from the EVAP pressure sensor. This points to a sensor performance issue affecting vapor system monitoring.

Symptoms

  • Check engine light on
  • Failed emissions test
  • No driveability symptoms

Common causes

  • Faulty EVAP pressure sensor
  • Loose or damaged fuel cap
  • Wiring or connector fault
  • Vapor line leak or restriction

Diagnostic steps

  1. Retrieve code and freeze frame
  2. Inspect fuel cap and vapor lines
  3. Monitor pressure sensor data
  4. Test sensor wiring and reference voltage
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