BMW fault code 0029

Automatic heating/air conditioning

In the automatic heating/air conditioning, code 0029 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.

Additional fan relay

Module versions: Automatic heating/air conditioning (IHKA38), Automatic heating/air conditioning (IHKA38_2), Automatic heating/air conditioning (IHKA38_3), Heating/air-conditioning regulation (IHKR38)

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

free 0x29

Module versions: Integrated automatic heating/air conditioning system (IHKA39_2), Automatic heating/air conditioning (IHKA85)

In: 3 Series (E36) 1990–2000, 3 Series (E46) 1998–2006, 5 Series (E39) 1995–2003, X3 (E83) 2003–2010, X5 (E53) 1999–2006, Z4 (E85) 2002–2008, Z4 (E86) 2006–2008, Z8 (E52) 2000–2003

Heater

Module versions: 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 41

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

AUC sensor

Module version: Automatic heating/air conditioning (IHKA39)

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

IHKA: Vehicle speed

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: dimming

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

Reading and clearing it

Fault code 0029 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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