Fault code P0445 – a step-by-step guide to diagnosing and fixing it

Error code P0445 is displayed and the check engine light is on - what does this mean?

DTC P0445 is triggered by the OBD/EOBD system when a problem is detected with the EVAP Purge Control Valve. This fault code indicates a malfunction in the fuel vapor recovery system, which prevents harmful vapors from being released into the atmosphere.

What can cause this error code?

• Defective EVAP purge valve
• Damaged or clogged vacuum lines
• Loose or corroded plug connections
• Defective activated charcoal filter
• Faulty wiring to the purge valve
• Defective engine control unit (ECU)
• Blocked fuel vapor lines
• Defective tank pressure sensor

What symptoms occur in parallel with fault code P0445?

• Engine power: Reduced engine power or rough idling
• Fuel consumption: Increased fuel consumption
• Odor formation: Fuel odor inside or outside the vehicle
• Starting behavior: Difficulty starting, especially after refueling
• Exhaust values: Increased emission values during the emissions test
• Tank ventilation: Problems when refueling or excess pressure in the tank

How can the problem with error code P0445 be rectified?

• Repairing trouble code P0445 requires a systematic diagnosis of the EVAP system.
• Replace the EVAP purge valve: Locate the defective purge valve and replace it with a new original part, properly securing all connections
• Check and replace vacuum lines: Inspect all EVAP system hoses for cracks, blockages or damage and replace defective lines
• Repair electrical connections: Clean plug connections to the flush valve, replace corroded contacts and repair broken cables
• Replace the activated charcoal filter: Replace the saturated or damaged activated charcoal filter with a new one, replacing the seals in the process
• Complete EVAP system diagnostics: Test the entire system with professional diagnostic equipment and check all components for proper function