P2445 — AIR System Pump Stuck Off Bank 1

P2445: AIR System Pump Stuck Off Bank 1 — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

AIR System Pump Stuck Off Bank 1. Basic catalogue definition; diagnostic details have not yet been reviewed.

Affected system: Powertrain

Symptoms

  • The check-engine lamp may illuminate.
  • Cold-start roughness or reduced power is possible on some vehicles.

Possible causes

  • The bank-1 secondary-air pump may fail to operate.
  • A blocked or loose hose or a switching/control valve fault may affect air delivery.
  • Damaged wiring, connectors, the pump fuse or its relay may prevent operation.

What to check

  • Inspect secondary-air hoses for leaks, disconnections or blockage.
  • When the vehicle's cold-start strategy permits, check whether the air pump operates.
  • Inspect the pump fuse, relay, wiring and switching valve before concluding that the pump itself is faulty.

Also written as: P2445-00, P244500 (some scan tools add the fault-type byte, e.g. -00).