P0441 Evap Emission Control System Incorrect Purge Flow

Code: P0441
Applies To: Most makes, generic code
Loose Cap Can Set It: Yes
Typical Fix: $210 to $251 at RepairPal

The computer did not see the right amount of fuel vapor flowing from the canister into the engine.
Check the gas cap first. A shop confirms it with the carmaker's EVAP test and a smoke machine before replacing parts.
Usually yes for now, but get it fixed soon and check for open recalls.

What The Carmakers Call It

EVAP emission control system incorrect purge flow, as printed by Volkswagen Group of America
Evaporative emission control system incorrect purge flow, as printed by Mazda North American Operations

Causes Named In Carmaker Bulletins

A leak at the fuel filler cap when the cap was not closed right after refueling (Mazda models listed in the bulletin) (source)
Engine computer software on a 2018 VW Tiguan, fixed by a programming update (source)

No source ranks these by how often they happen, so they are listed as the bulletins give them.

Mazda says P0441 is a purge flow code but can be stored when vapor leaks from a cap that was not closed right after refueling.

What The Fix Costs

The usual part for this code is the purge valve. Published estimates put it at $210 to $251 at RepairPal. The full table with every source and date is on the cost page. A diagnosis first keeps you from paying for a part you did not need, which is why we price what a check engine diagnostic costs before the fix.

Getting The Light To Go Off

After the repair the light goes off once the EVAP test runs and passes on three drive cycles in a row, and the code is erased after 40 warm up cycles, per CARB. The test only runs under set conditions such as a fuel level between about 15 and 85 percent, so it can take days.