Hi,
P0441: Evaporative Emission Control System - Incorrect Purge Flow
This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses.
The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.
Possible causes:
- Bad vacuum switch
- Broken or damaged EVAP line or canister
- Open in PCM purge command circuit
- Open or short in Voltage feed circuit to Purge Solenoid
- Faulty purge solenoid
- Restriction in EVAP solenoid, line or canister
- Corrosion or resistance in purge connector
Possible solutions:
Replace Leak Detection Pump / LDP (if applicable to your vehicle)
Repair damaged EVAP lines or canister
Repair open or short in voltage feed circuit to Purge Solenoid
Repair open in PCM purge command circuit
Replace purge Solenoid
Replace vacuum switch
Repair restriction in Evap line or canister or soleniod
Repair resistance in purge connector
Check ALL the above until you correct the issue. NEVER replace PCM, unless you prove the PCM to be faulty (as a last resort).
Cheers,