P2508 – ECM/PCM Power Input High

Description

The ECM detects excessive voltage at its power input.

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Symptoms

  • Electrical issues
  • Hesitation
  • Check engine light

Causes

  • Faulty alternator
  • Bad regulator
  • Wiring short

Diagnosis

  • Test alternator
  • Inspect regulator
  • Check wiring

Repair

  • Replace alternator
  • Repair wiring