Your 2022 Impreza's steady check engine light with P0441 indicates a problem with the evaporative emission system's purge flow. While not affecting how the car drives, this emissions code needs attention for testing and environmental reasons.
Understanding P0441
The P0441 code means "Evaporative Emission Control System Incorrect Purge Flow." The EVAP system captures fuel vapors and routes them to the engine for burning. The purge valve controls this vapor flow, and P0441 indicates the system isn't flowing as expected.
How EVAP Works
Fuel vapors collect in a charcoal canister instead of venting to atmosphere. When conditions are right, the purge valve opens to let the engine vacuum draw these vapors into the intake to be burned. P0441 triggers when the system detects incorrect purge flow.
Symptoms
- Check engine light on
- Usually no driveability issues
- Possible fuel smell near vehicle
- May have difficulty at gas pump (slow fill)
Common Causes
- Faulty purge valve - Stuck open or closed
- Purge valve wiring - Electrical issue
- Vacuum leak in EVAP lines - Cracked hoses
- Blocked EVAP lines - Debris restricting flow
- Charcoal canister - Saturated or damaged
- Gas cap - Poor seal affecting system
Diagnostic Steps
- Check gas cap seal and tightness
- Inspect EVAP hoses for cracks or disconnection
- Test purge valve operation with scan tool
- Check purge valve electrical connector
- Perform smoke test for leaks
Repair Costs
- Gas cap: $15-$40
- Purge valve: $100-$250
- EVAP hose repair: $100-$250
- Charcoal canister: $200-$400
- EVAP smoke test: $100-$150