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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Powertrain DTC Charts & Descriptions (Except Diesel & Hybrid) >> DTC Diagnosis >> DTC P2448: - Secondary Air Injection System High Airflow (Bank 1)

DTC P2448: - Secondary Air Injection System High Airflow (Bank 1)

DTC P2448: - SECONDARY AIR INJECTION SYSTEM HIGH AIRFLOW (BANK 1)

Description:  The AIR system detects excessive mass air flow change with the pump on and a rich exhaust system air fuel ratio.
Possible Causes: 
  • AIR outlet hose leak.
  • AIR outlet hose is disconnected.
Diagnostic Aids:  Measured air flow is less than expected. Visually inspect the secondary AIR inlet hose.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to Pinpoint Test HM .