Fault code P1445 – a step-by-step guide to diagnosing and fixing it

Error code P1445 is displayed and the check engine light is on - what does this mean?

The DTC P1445 is a manufacturer-specific fault code that is recognized by the OBD system and indicates a problem with the fuel tank ventilation system. This trouble code occurs when the EOBD system detects a fault in the area of the fuel vapor recirculation or the activated carbon filter.

What can cause this error code?

• Defective activated charcoal filter
• Blocked tank ventilation line
• Damaged fuel vapor lines
• Defective tank ventilation valve
• Loose or corroded plug connections
• Leaking fuel tank cap
• Defective vacuum pump in the tank ventilation system
• Clogged fuel filter
• Damaged pressure sensor in the tank system

What symptoms occur in parallel with fault code P1445?

• Starting problems: The vehicle may be difficult to start or run unevenly
• Smell of fuel: Smell of fuel in the vehicle interior or around the vehicle
• Loss of power: Reduced engine power, especially at full throttle
• Increased fuel consumption: Noticeably higher fuel consumption in city traffic
• Uneven idling: Engine runs unevenly at idle speed
• Jerking when accelerating: Vehicle jerks or stutters when accelerating

How can the problem with error code P1445 be rectified?

• Repairing this fault code requires a systematic approach to identifying and eliminating the cause.
• Replace the activated charcoal filter: Replace the activated charcoal filter completely, as this is often the main cause of P1445 and cannot be cleaned
• Check and clean the tank ventilation lines: Check all vacuum lines for blockages and blow through or replace if necessary
• Replace tank vent valve: Replace the electric tank vent valve if it is mechanically or electrically defective
• Replace fuel tank cap: Install a new, sealing tank cap to stabilize the vacuum system
• Check electrical connections: Check all plug connections in the tank ventilation system for corrosion and tight fit and clean them
• Replace the pressure sensor in the tank system: Replace the tank pressure sensor if it is sending incorrect values to the control unit