Auto-Union OBD Trouble Code 46

Charging system voltage too high
Battery voltage sense input above target charging voltage during engine operation. Computer is indicating that the battery voltage is not being regulated.

Battery voltage too high during charging or charging system voltage too low

Battery charging voltage out of range

Pass-key II - circuit or Power steering pressure switch - circuit fault error ( Depending on the car model )

Secondary Air Injection not bypassed during Self-Test.