424282db_ft_error_codes_troubleshooting__Notes
[Unit] DME [Error dec/hex] 65 [Parameter dec/hex] 41 [BMW Model] E39 528i Touring [Year] 1997 [What is it] Faulty Camshaft position sensor [What I’m experiencing] Engine that doesn’t turn well (sometimes cylinder misfire), loss of power (not complete, just like driving something like a 70HP car), gas kickdown with slower than normal engine response. BMW tech explained me that when DME detect abnormal sensor response, it goes in "safe mode" allowing you to drive, but in a relaxed and safer way for the engine. Another important thing: NO engine check light on! [Where is the fault] In the camshaft sensor [How to solve] Change the Camshaft position sensor, check the wiring and contacts, if you can check the correct signal pattern in the flywheel head [Notes] 
Error VERIFIED by me as true (I had this fault in my car)
BMW | P.A. Soft error codes troubleshooting
Notes