P0601

P0601-INTERNAL MEMORY CHECKSUM ERROR

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
While the ignition is on.

- Set Condition:
A deviation between the Powertrain Control Module memory and a stored calibration.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.

1. FLASH PCM
1. Using the scan tool, reflash the PCM with the proper calibration for the particular truck.

Is the flash successful?

Yes

- Repair complete.

No

- Go To 2

2. POWERTRAIN CONTROL MODULE
1. With the scan tool, read DTCs.

Did P0601 set after the reflash?

Yes

- Replace the Powertrain Control Module.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

No

- Test Complete.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.