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2011 FORD F-150
3.7L V6•4WD•AUTOMATIC•gas
6 active safety recalls on this vehicle — view recalls
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Repairs0Labor551Torque4626Fluid9DTC939Battery1Maintenance0Recalls6
P1443moderate severityPowertrain

EVAP System Control Valve Malfunction

on 2011 Ford F-150 3.7L V6 · 4WD

What this code means

The Evaporative Emission Control System purge control valve has a malfunction, showing low or no flow. The EVAP canister purge solenoid is not operating correctly, which can allow fuel vapors to escape or cause driveability issues.

Symptoms

  • Check Engine Light
  • Decreased fuel efficiency
  • Fuel odor
  • Rough or erratic idle (if valve stuck open)
  • Failed emissions test

Common causes

  • Faulty purge valve/solenoid (stuck open or closed)
  • Damaged or clogged vacuum lines
  • Defective charcoal canister
  • Wiring issue to purge solenoid
  • Clogged hose between purge valve and fuel tank

Diagnostic steps

  1. Command purge solenoid open/closed with scan tool and verify operation
  2. Test purge solenoid resistance
  3. Inspect vacuum lines for cracks or blockages
  4. Use smoke machine to check EVAP system for leaks
  5. Check for blockages between fuel tank and canister

Repair notes

Replace purge valve solenoid. Repair damaged vacuum lines. Replace charcoal canister if contaminated.

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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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