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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
P0450low severityPowertrain

Evaporative Emission System Pressure Sensor/Switch Malfunction

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

What this code means

The PCM detected a fault with the EVAP pressure sensor or switch. This can prevent accurate monitoring of fuel vapor system pressure.

Symptoms

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

Common causes

  • Faulty EVAP pressure sensor
  • Wiring or connector fault
  • Damaged fuel tank or vapor lines
  • Failed PCM input circuit

Diagnostic steps

  1. Retrieve code and freeze frame
  2. Inspect pressure sensor wiring
  3. Test sensor signal and reference voltage
  4. Verify EVAP system integrity
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