P0601-INTERNAL MEMORY CHECKSUM INVALID

For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    With the ignition on.

  • Set Condition:

    Internal checksum for software failed, does not match calculated value. One Trip Fault, Three Good Trips to clear.


Possible Causes
  
PCM
  

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).



Diagnostic Test

1.PCM

NOTE: Diagnose any CMP or CKP Sensor faults before continuing. Check for intermittent loose CMP or CKP connections.



The Powertrain Control Module is reporting internal errors, view repair to continue.

Repair