64 99... Fault 05 Temperature sensor
WARNING: This page is about a different car, the 2003 BMW 525i, 2002 BMW 525i, and 2001 BMW 525i. However, it is still accessible from the selected car via links, so may be relevant.
Instruction:
Repeat flashcode readout. If 3 flash pulses are read out again, replace the independent parking heater control unit because the temperature sensor is integrated in the control unit.