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P2508 - ECM / Pcm Power Input Signal High

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P2508 - ECM / PCM POWER INPUT SIGNAL HIGH

Description:  The powertrain control module (PCM) monitors the internal 5 volt power supply. When the 5 volt power supply voltage is greater than a calibrated threshold this DTC sets.
Possible Causes: 
  • Battery voltage high
  • Charging system concern
  • Damaged PCM
Diagnostic Aids: 
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST AJ .
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