P0441EVAP System Incorrect Purge Flow
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- The evaporative emission (EVAP) system stores fuel vapour from the tank in a charcoal canister; a purge valve lets the engine draw it off, and a vent valve opens the canister to fresh air. P0441 means the actual purge flow does not match the target – too little, or flow although the purge valve is closed. CARB requires a fault when no purge flow is detected. Strategies differ widely: Saab's Trionic T7/T8 sets it for flow with the valve closed (tank pressure falling faster than 27.5–40 Pa/s), VW and Audi check purge flow with the leak detection pump, Honda/Acura for a sticking purge valve. GM and Ford do not use P0441 – they report flow with the valve closed as P0496 or P1450 and missing flow as P0455.
- What you may notice
- Check engine light on
- Rough idle or hard start after refuelling (valve stuck open)
- Fuel smell
- Possibly fuel trim codes
- Likely causes
- LikelyPurge valve stuck open or not sealing
- PossiblePurge valve stuck closed, purge line blocked, kinked or off
- PossibleLeak detection pump with tolerance fault (VW)
- RareCanister saturated or damaged, turbo purge check valve faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €40 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.