BMW and MINI P0441 Error – Fault Code – Incorrect Purge Flow
This answer is applicable for many BMWs in addition to the one listed below.
I own a 2000 BMW 528i automatic with 108,000 miles and have a “service engine soon” light that just came on. I used my OBDII code reader and get a P0441 error code that says “Evaporative Emission Systems Incorrect Purge Flow. The car seems to run fine and I have unscrewed the gas cap and put it back on, the light remains on. Can you think of what I should try next or what this could be?
This fault code is an EPA mandated OBD-II Engine Management fault code and it would apply to all BMW and MINI models produced from 1996-on.
The fault code is indicating that either the purge valve is faulty or there is a leak in the fuel tank venting and vapor recovery system. The purge valve is a part of the fuel tank venting system. The first step is to reset (clear) the fault code and see if it returns. If it does, we may have a faulty purge valve or a possible leak in the system. We would look to the purge valve as the first likely culprit. The purge valve is mounted between the charcoal canister and the throttle body. If there is a leak in the system, you will have to have a “smoke test” done. This test injects a smoke into the system, under pressure, and the smoke will leak out at any points of system leakage.