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Home >> Ford >> 2005 >> Focus ZX3 SES, Automatic >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Powertrain DTC Charts & Description (Except Diesel & Hybrid) >> Diagnostic Trouble Code (DTC) Charts And Descriptions >> DTC P0603: Internal Control Module Keep Alive Memory (KAM) Error
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DTC P0603: Internal Control Module Keep Alive Memory (KAM) Error

P0603 - INTERNAL CONTROL MODULE KEEP ALIVE MEMORY (KAM) ERROR

Description:  Indicates the PCM has experienced an internal memory fault. However, there are external items that can cause this DTC.
Possible Causes: 
  • Reprogramming
  • Battery terminal corrosion
  • KAPWR to PCM interrupt/open
  • Loose battery connection
Diagnostic Aids:  If KAPWR is interrupted to the PCM because of a battery or PCM disconnect, this DTC can be generated on the first power-up.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to QB: DTCs P0603 or P1633: Keep Alive Power STEP QB1. - GO to QB: DTCs P0603 or P1633: Keep Alive Power STEP QB1.