P0606

P0606-INTERNAL CONTROL PROCESSOR

Theory of Operation

This fault code is triggered when the internal Powertrain Control Module (PCM) diagnostics detect a read or write error internal to the module. The PCM illuminates the MIL light immediately when the diagnostic runs and fails. The PCM will turn off the MIL light immediately after the diagnostic runs and passes. This fault code can only be caused by an internal PCM problem and may prevent the engine from starting.

- When Monitored:
With ignition on.

- Set Condition:
Powertrain Control Module has detected internal failures.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.
POWERTRAIN CONTROL MODULE
1. Turn the ignition off.
2. Verify all chassis grounds are properly connected. Perform the CHECKING ECM POWERS AND GROUNDS diagnostic procedure. Checking The PCM Power And Grounds
3. Turn ignition on, engine not running.
4. With the scan tool, read DTCs.

Is P0606 stored?

Yes

- Repair complete.

No

- Replace and program the Powertrain Control Module. PCM/ECM Reprogramming