Evap Purge Valve Incorrect Flow Fault

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EVAP PURGE SYSTEM PERFORMANCE

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EVAP PURGE SYSTEM PERFORMANCE

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Evaporative Emission Control System Incorrect Purge Flow

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This suggests that part of the EVAP control system isn't functioning correctly. The EVAP system consists of many parts, including: the gas cap, fuel lines, carbon canister, purge valve, and hoses.

The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed thru hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum pull the stored vapors into the engine to be burned. This purging process is contolled by a valve. A vacuum switch is typically used to detect when flow exists. If the PCM tries to purge and sees that the switch is still closed (indicating no flow) P0441 is set.

Solutions:

• Replace Leak Detection Pump / LDP
• 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
• Replace PCM