P0601

P0601-INTERNAL MEMORY CHECKSUM INVALID

For a complete wiring diagram Refer to Diagrams/Electrical.


- 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. The ETC light will flash if equipped.







Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Initial Inspection and Diagnostic Overview .


Diagnostic Test


1. POWERTRAIN CONTROL MODULE (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


- Replace and program the Powertrain Control Module.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test