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Home/DTC Codes/Mazda/CX-9/2007-2015 3.7L V6/P1443
P1443

EVAP System Purge Flow Fault

2007-2015 Mazda CX-9 3.7L V6

Low SeverityPowertrain

Description

The PCM has detected insufficient or excessive purge flow in the Evaporative Emission Control System. The purge valve is not controlling fuel vapor flow from the charcoal canister to the intake manifold as expected.

Symptoms

  • Check Engine Light
  • Rough idle if purge valve stuck open
  • Fuel odor
  • Failed emissions test

Common Causes

  • Faulty purge solenoid valve stuck open or closed
  • Cracked or blocked purge hoses
  • Charcoal canister saturated or blocked
  • Vacuum leak in EVAP system
  • Purge valve wiring issue

Diagnostic Steps

  1. Command purge valve open and closed with scan tool and verify flow
  2. Test purge solenoid resistance
  3. Inspect purge hoses for cracks or blockage
  4. Check charcoal canister condition
  5. Smoke test EVAP system

Repair Notes

Replace the purge solenoid valve if it is stuck; repair damaged hoses.

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 ShortP1450Secondary Air Injection System Circuit ShortP1450Secondary Air Injection System Circuit ShortP1450Unable to Bleed Up Fuel Tank Vacuum

Other Powertrain Codes

P1443 on Other Vehicles

Mazda 626

1993-1997 2.0L I4

Mazda 626

1993-1997 2.5L V6

Mazda 626

1998-2002 2.0L I4

Mazda 626

1998-2002 2.5L V6

Mazda Axela

2013-2019 1.5L I4 P5-VPS

Mazda B2300

1994-1997 2.3L I4

Mazda B2300

2002-2009 2.3L I4

Mazda B2500

1998-2001 2.5L I4

Common Questions

What does code P1443 mean on a 2007-2015 Mazda CX-9?

P1443 stands for "EVAP System Purge Flow Fault". The PCM has detected insufficient or excessive purge flow in the Evaporative Emission Control System. The purge valve is not controlling fuel vapor flow from the charcoal canister to the intake manifold as expected.

What are the symptoms of P1443 on a Mazda CX-9?

Common symptoms of P1443 include: Check Engine Light, Rough idle if purge valve stuck open, Fuel odor, Failed emissions test.

What causes P1443 on a 2007-2015 Mazda CX-9?

Common causes of P1443 include: Faulty purge solenoid valve stuck open or closed, Cracked or blocked purge hoses, Charcoal canister saturated or blocked, Vacuum leak in EVAP system, Purge valve wiring issue.

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