P0441 - EVAPORATIVE EMISSION CONTROL SYSTEM INCORRECT PURGE FLOW

This DTC code refers to the evaporative emission control system (EVAP) and indicates that a part of it does not work correctly.

The Evaporative Emissions Control System (EVAP) consists of the gas cap, fuel lines, carbon filter, purge valve and other hoses, its objective is to control the emissions and thus avoid the leakage of fuel vapors from the vehicle fuel system.

The fuel vapors are connected by means of hoses to a carbon filter, which stores them. At the moment the engine is running a purge control valve opens and thus gives way to the intake vacuum so that the fuel vapors in the engine are diverted. These fuel vapors are stored, and the purge valve allows the vacuum of these, but they are not expelled into the atmosphere, but they are burned. A vacuum switch is used to detect when there is a flow.

If the PCM (Powertrain Control Module) activates the purge valve and sees that the switch is closed, indicating that there is no purge flow detected and DTC code P0441 is established.

• The Check Engine light is on.
• You may perceive a strong smell of fuel.

A code P0441 can be caused by one or more of the following problems:

• The vacuum interrupter may be defective.
• A fuel line from the Evaporative Emission Control System (EVAP) system may be damaged.
• There may be a short in the voltage supply circuit of the purge solenoid.
• The purge solenoid may be defective.

To fix the DTC code P0441 you can check the following components:

• Check the fuel lines and if one of these is defective, repair it.
• Check the voltage supply circuit to the purge solenoid and if there is a short circuit, repair it.
• The purge control circuit of the Power Train Control Module (PCM) may be short, so check and repair if necessary.
• You can change the purge solenoid.
• Replace the vacuum switch.
• Repair the resistance in the purge connector.