Peugeot 607 Electrical Issues

I understand your concern regarding the electrical issues. Intermittent faults can be frustrating. The sporadic errors and system failures, particularly in audio/navigation, coupled with the stored error codes, suggest a potential problem with the BUS system or a related control unit connection. Have you checked the main ground connections and battery terminals for corrosion or looseness? What specific error codes are you seeing with your scan tool?

I've inspected the main ground connections and battery terminals, and they appear to be in good order. I will retrieve the specific error codes from the scan tool's memory. What can the error codes tell us about this issue? I am not particularly adept at interpreting them.

Error codes can offer insights, but their interpretation isn't always straightforward. The codes are just pointers; their presence confirms an issue but rarely pinpoints the exact cause. Given the symptoms you've described – intermittent system failures and potential BUS system involvement – I'd recommend taking your Peugeot 607 to a qualified workshop for a professional diagnosis. It sounds like a potentially complex electrical problem, and a skilled technician with specialized diagnostic tools will be best equipped to identify the root cause.

Based on your recommendation and the complexity, I sought assistance from a qualified workshop. They confirmed a defective cable connection to the control unit, impacting the BUS system, as suspected. The repair cost was 155€, which I consider reasonable. Thank you again for your time and consideration.