EVAP System Purge Flow Fault
2014-2018 Mazda Mazda3 2.5L I4
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
- Command purge valve open and closed with scan tool and verify flow
- Test purge solenoid resistance
- Inspect purge hoses for cracks or blockage
- Check charcoal canister condition
- Smoke test EVAP system
Repair Notes
Replace the purge solenoid valve if it is stuck; repair damaged hoses.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1443 on Other Vehicles
Common Questions
What does code P1443 mean on a 2014-2018 Mazda Mazda3?
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 Mazda3?
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 2014-2018 Mazda Mazda3?
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.