BMW fault code 0023

Automatic heating/air conditioning

In the automatic heating/air conditioning, code 0023 means different things depending on the version of the module in the car. Find your car below; the app shows the right one for yours.

Terminal 58g

Module versions: Automatic heating/air conditioning (IHKA39), Integrated automatic heating/air conditioning system (IHKA39_2), Automatic heating/air conditioning (IHKA39_3), Automatic heating/air conditioning (IHKA39_4)

In: 3 Series (E36) 1990–2000, 3 Series (E46) 1998–2006, 5 Series (E39) 1995–2003, X5 (E53) 1999–2006, Z8 (E52) 2000–2003

free 0x23

Module versions: Automatic heating/air conditioning (IHKA38_2), Automatic heating/air conditioning (IHKA38_3)

In: 3 Series (E46) 1998–2006, 7 Series (E38) 1994–2001, X5 (E53) 1999–2006, Z8 (E52) 2000–2003

free 35

Module versions: Automatic heating/air conditioning (IHKA46), Automatic heating/air conditioning (IHKA46_2)

In: 3 Series (E36) 1990–2000, 3 Series (E46) 1998–2006, X5 (E53) 1999–2006, Z8 (E52) 2000–2003

Stratification potentiometer rear

Module version: Automatic heating/air conditioning (IHKA38)

In: 3 Series (E46) 1998–2006, 7 Series (E38) 1994–2001, X5 (E53) 1999–2006, Z8 (E52) 2000–2003

IHKA: Blower control voltage

Module version: Automatic heating/air conditioning (IHKA39_5)

In: 3 Series (E36) 1990–2000, 3 Series (E46) 1998–2006, 5 Series (E39) 1998–2003, X5 (E53) 1999–2006, Z8 (E52) 2000–2003

IHKA: Info: K bus: outside temperature

Module version: Automatic heating/air conditioning (IHKA46_3)

In: 3 Series (E36) 1990–2000, 3 Series (E46) 1998–2006, X3 (E83) 2003–2010, X5 (E53) 1999–2006, Z4 (E85) 2002–2008, Z4 (E86) 2006–2008, Z8 (E52) 2000–2003

IHKA: Motor, temperature mixing flap

Module version: Automatic heating/air conditioning (IHKA85)

In: X3 (E83) 2003–2010, Z4 (E85) 2002–2008, Z4 (E86) 2006–2008

Stratification potentiometer rear IHKA

Module version: Heating/air-conditioning regulation (IHKR38)

In: 3 Series (E46) 1998–2006, 7 Series (E38) 1994–2001, X5 (E53) 1999–2006, Z8 (E52) 2000–2003

IHKR: Transport mode active

Module version: Heating/air-conditioning regulation (IHKR39)

In: 3 Series (E36) 1990–2000, 3 Series (E46) 1998–2006, 5 Series (E39) 1998–2003, X5 (E53) 1999–2006, Z8 (E52) 2000–2003

Reading and clearing it

Fault code 0023 is a BMW code, stored in the car's automatic heating/air conditioning, not a generic OBD2 code (P0xxx): a generic OBD2 reader only reaches the engine's emissions faults, so it won't show it. AutoLingo for BMW reads it with BMW's own diagnostic protocols, in plain English, with the details the module stored about it, and clears it after a repair. If a fault comes right back after it's cleared, the problem is still there.

The automatic heating/air conditioning is on: 3 Series (E36), Z3 (E36/7), 7 Series (E38), 5 Series (E39), 3 Series (E46), Z8 (E52), X5 (E53), X3 (E83), Z4 (E85), Z4 (E86)

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