P0601 – Internal Control Module Memory Check Sum Error

Description

The ECM detects an internal memory checksum error.

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Symptoms

  • No start
  • Poor performance
  • Check engine light

Causes

  • ECM internal failure
  • Corrupted memory
  • Voltage spikes

Diagnosis

  • Scan for ECM faults
  • Check battery/charging system
  • Inspect grounds

Repair

  • Replace ECM
  • Reprogram ECM
  • Repair power/ground issues