BMW automatic heating/air conditioning fault codes
The 74 fault codes the automatic heating/air conditioning can store, and what each one means. Some codes mean different things in different versions of the module; tap a code to see which applies to your car.
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)
- 0000 IHKA: Ventilation-flap motor (and 7 other meanings)
- 0001 IHKA: Defrosting-flap motor (and 10 other meanings)
- 0002 IHKA: Footwell flap motor (and 8 other meanings)
- 0003 Defrost flap motor (and 8 other meanings)
- 0004 Rear room flap motor (and 9 other meanings)
- 0005 Footwell flap motor right (and 10 other meanings)
- 0006 Latent heat storage temperature sensor (and 11 other meanings)
- 0007 Heat exchanger sensor left (and 8 other meanings)
- 0008 Heat exchanger sensor right (and 8 other meanings)
- 0009 free 0x09 (and 6 other meanings)
- 000A AUC sensor (and 9 other meanings)
- 000B Terminal 30 (and 11 other meanings)
- 000C free 0x0C (and 9 other meanings)
- 000D Integrated automatic heating / air conditioning system: Interior temperature sensor (and 12 other meanings)
- 000E AUC heating (and 11 other meanings)
- 000F Additional fan relay (and 9 other meanings)
- 0010 Washer nozzle heating relay (and 8 other meanings)
- 0011 Relay rear window heating (and 10 other meanings)
- 0012 Magnetic clutch air conditioning compressor (and 9 other meanings)
- 0013 free 0x13 (and 7 other meanings)
- 0014 DME-AC (and 8 other meanings)
- 0015 Auxiliary water pump (and 7 other meanings)
- 0016 Water valve left (and 9 other meanings)
- 0017 Water valve right (and 10 other meanings)
- 0018 free 0x18 (and 8 other meanings)
- 0019 Auxiliary heater wake line (and 8 other meanings)
- 001A Blower control voltage (and 7 other meanings)
- 001B Actuator Y left (and 9 other meanings)
- 001C free 0x1C (and 6 other meanings)
- 001D free 0x1D (and 7 other meanings)
- 001E free 0x1E (and 7 other meanings)
- 001F free 0x1F (and 6 other meanings)
- 0020 Vehicle speed (and 10 other meanings)
- 0021 Coolant temperature (and 10 other meanings)
- 0022 Engine speed (and 8 other meanings)
- 0023 Terminal 58g (and 8 other meanings)
- 0024 LCD backlight (and 8 other meanings)
- 0025 Latent heat storage shut-off valve (and 7 other meanings)
- 0026 Engine running (and 8 other meanings)
- 0027 free 0x27 (and 5 other meanings)
- 0028 free 0x28 (and 3 other meanings)
- 0029 Additional fan relay (and 6 other meanings)
- 002A Windshield heating relay (and 6 other meanings)
- 002B Relay rear window heating (and 5 other meanings)
- 002C free 0x2C (and 4 other meanings)
- 002D Auxiliary water pump (and 6 other meanings)
- 002E Water valve left (and 6 other meanings)
- 002F Water valve right (and 4 other meanings)
- 0030 Auxiliary heating check valve (and 4 other meanings)
- 0031 free 0x31 (and 4 other meanings)
- 0032 free 0x32 (and 4 other meanings)
- 0033 Actuator Y right (and 4 other meanings)
- 0034 Heat exchanger target temperature left (and 3 other meanings)
- 0035 Heat exchanger target temperature right (and 2 other meanings)
- 0036 Outside temperature (and 2 other meanings)
- 0037 Vehicle speed (and 1 other meaning)
- 0038 Coolant temperature (and 1 other meaning)
- 0039 Engine speed (and 1 other meaning)
- 003A Terminal 58g (and 1 other meaning)
- 003B Engine hood open (and 1 other meaning)
- 003C Reverse gear engaged (and 1 other meaning)
- 003D Engine running (and 1 other meaning)
- 003E Standby ventilation on/off (and 1 other meaning)
- 003F Standby heating on/off (and 1 other meaning)
- 0040 AUC sensor
- 0041 free 0x41 (and 2 other meanings)
- 0042 Blower control voltage
- 0043 free 0x43
- 0044 free 0x44
- 0045 free 0x45
- 0050 IHKA: Incorrect A/C box fitted
- 0051 IHKA: LHD / RHD implausible coding
- 0056 Info incorrect checksum
- 00FF IHKA: transport mode active (and 3 other meanings)
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