P0601

SYMPTOM
P0601 - INTERNAL MEMORY CHECKSUM INVALID

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. Scan Tool Testing and Procedures


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
Replace and program the Powertrain Control Module per Service Information. Perform (NGC) POWERTRAIN VERIFICATION TEST VER-1. Powertrain Verification Test - Ver 1