Evaporative Emission Control System Incorrect Purge Flow
What it means: OBD-II code P0441 indicates an issue with the evaporative emission control system on your Volkswagen.
This trouble code is triggered when part of the EVAP control system isn’t functioning as it should. The EVAP is made up of many parts, including: the gas cap, fuel lines, purge valve, hoses, and a carbon canister. This system prevents fuel vapors from escaping the vehicle’s fuel system. The fuel vapors are routed by hoses to the charcoal canister for storage and a purge control valve allows them to be sucked into the engine and burnt off.
A Golf TSI engine via Herranderssvensson
A vacuum switch detects when the flow goes from the fuel tank to the engine to be burned and when the switch is closed, thus triggering the DTC code P0441.
Causes of DTC P0441 might include:
- Bad vacuum switch
- Broken EVAP line or canister
- Short in wires leading to the purge solenoid
- Faulty purge solenoid
- Restriction in EVAP solenoid, line, or canister
- Corrosion at connections in system
Finding the exact cause often starts with doing a visual inspection to identify any obvious damages to the system. Check for worn or cracked parts, torn or broken lines, and corrosion around connections and plugs. From there, you will have to identify the faulty part for replacement.
Much of the time, the vacuum switch is bad, but that’s not always the case. In very rare cases, the vehicle’s ECM is faulty and must be replaced. This possibility should only be considered after all of the other possible causes are addressed and the code keeps coming back after it is cleared. Other signs of a bad ECM include erratic shifting in automatic transmissions, poor performance, and a vehicle that won’t cut on when no other causes are present.
Note: While every effort has been made to provide accurate information and advice about the DTC P0441, you should consult with a professional mechanic before making major repairs. This guide is meant to offer insight into the problems that might trigger trouble code P0441, and it is not meant to be a definitive repair guide.