P0601 – Internal Control Module Memory Check Sum Error

Description

The ECM detects an internal memory checksum error.

Want to confirm the real cause of this fault code?

A high-quality OBD2 scanner gives you live data, fuel trims, sensor readings and freeze-frame information — exactly what you need to verify the root cause of this code with confidence.

View Recommended Scanners

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