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Home/DTC Codes/Lincoln/MKX/2007-2015 3.5L V6/P1443
P1443

EVAP System Control Valve Malfunction

2007-2015 Lincoln MKX 3.5L V6 🇩🇪

Moderate SeverityPowertrain

Description

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.

Related Codes

P0443EVAP System Purge Control Valve CircuitP0446EVAP Vent Control CircuitP1450Unable to Bleed Up Fuel Tank VacuumP1450Unable to Bleed Up Fuel Tank VacuumP1450Unable to Bleed Up Fuel Tank VacuumP1450Secondary Air Injection System Circuit ShortP1450Secondary Air Injection System Circuit ShortP1450Secondary Air Injection System Circuit ShortP1450Unable to Bleed Up Fuel Tank VacuumP1450Secondary Air Injection System Circuit ShortP1450Secondary Air Injection System Circuit ShortP1455EVAP System Leak Detected (Gross Leak / No Flow)P1455EVAP System Leak Detected (Gross Leak / No Flow)P1455EVAP System Leak Detected (Gross Leak / No Flow)

Other Powertrain Codes

P1443 on Other Vehicles

Lincoln Aviator

2003-2005 4.6L V8

Lincoln Aviator

2003-2005 4.6L V8 DOHC

Lincoln Aviator

2020-2024 3.0L Twin-Turbo V6

Lincoln Aviator

2020-2024 3.0L V6 Twin Turbo

Lincoln Aviator Grand Touring

2020-2024 3.0L Twin Turbo V6 PHEV

Lincoln Aviator Grand Touring

2020-2024 3.0L Twin-Turbo V6 Hybrid

Lincoln Aviator Grand Touring

2020-2024 3.0L V6 Twin Turbo Hybrid

Lincoln Blackwood

2002-2002 5.4L V8

Common Questions

What does code P1443 mean on a 2007-2015 Lincoln MKX?

P1443 stands for "EVAP System Control Valve Malfunction". 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.

What are the symptoms of P1443 on a Lincoln MKX?

Common symptoms of P1443 include: Check Engine Light, Decreased fuel efficiency, Fuel odor, Rough or erratic idle (if valve stuck open), Failed emissions test.

What causes P1443 on a 2007-2015 Lincoln MKX?

Common causes of P1443 include: 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.

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