EVAP Vent Control Function Problem
2012-2016 Subaru Impreza 2.0L H4
Description
The PCM has detected a functional problem with the EVAP canister vent control. The vent valve is not performing its intended function during the EVAP system leak check, preventing the system from sealing for the pressure test.
Symptoms
- Check Engine Light
- Failed emissions test
- EVAP monitor will not complete
- Possible fuel odor
Common Causes
- Faulty canister vent control valve (stuck open)
- Vent valve wiring issue
- Blocked or damaged vent line
- Charcoal canister blockage
- Vent filter clogged with debris
Diagnostic Steps
- Command vent valve closed with scan tool and check if system holds vacuum
- Test vent valve solenoid resistance
- Inspect vent line for blockage
- Check vent filter for debris
- Smoke test EVAP system
Repair Notes
Replace the canister vent valve if it does not seal when commanded closed.
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 2012-2016 Subaru Impreza?
P1443 stands for "EVAP Vent Control Function Problem". The PCM has detected a functional problem with the EVAP canister vent control. The vent valve is not performing its intended function during the EVAP system leak check, preventing the system from sealing for the pressure test.
What are the symptoms of P1443 on a Subaru Impreza?
Common symptoms of P1443 include: Check Engine Light, Failed emissions test, EVAP monitor will not complete, Possible fuel odor.
What causes P1443 on a 2012-2016 Subaru Impreza?
Common causes of P1443 include: Faulty canister vent control valve (stuck open), Vent valve wiring issue, Blocked or damaged vent line, Charcoal canister blockage, Vent filter clogged with debris.