B08xx OBD-II Codes (B0800–B0899)
100 fault codes in the B08xx range. Click any code for causes, diagnostic steps, severity, and common fixes.
B0800 low
Cabin Temperature Sensor Circuit Malfunction
B0801 low
Cabin Temperature Sensor Open
B0802 low
Cabin Temperature Sensor Short
B0803 low
Cabin Temperature Sensor Range
B0804 low
Ambient Temperature Sensor Circuit
B0805 low
Ambient Temperature Sensor Open
B0806 low
Ambient Temperature Sensor Short
B0807 low
Ambient Temperature Sensor Range
B0808 low
Evaporator Temperature Sensor Circuit
B0809 low
Evaporator Temperature Sensor Open
B0810 low
Evaporator Temperature Sensor Short
B0811 low
Evaporator Temperature Sensor Range
B0812 low
Heater Core Temperature Sensor Circuit
B0813 low
Heater Core Temperature Sensor Open
B0814 low
Heater Core Temperature Sensor Range
B0815 low
Sunload Sensor Circuit Malfunction
B0816 low
Sunload Sensor Circuit Open
B0817 low
Sunload Sensor Circuit Short
B0818 low
Sunload Sensor Left Circuit
B0819 low
Sunload Sensor Right Circuit
B0820 low
Duct Temperature Sensor Floor
B0821 low
Duct Temperature Sensor Dash
B0822 low
Duct Temperature Sensor Defrost
B0823 low
Duct Temperature Sensor Rear
B0824 low
Refrigerant Pressure Sensor Circuit
B0825 low
Refrigerant Pressure Sensor Range
B0826 low
Refrigerant Temperature Sensor Circuit
B0827 low
Compressor Clutch Circuit
B0828 low
Compressor Clutch Relay
B0829 low
Compressor Speed Sensor
B0830 low
Compressor Displacement Control
B0831 low
AC High Pressure Switch Circuit
B0832 low
AC Low Pressure Switch Circuit
B0833 low
AC Pressure Transducer Circuit
B0834 low
AC System Performance Monitor
B0835 low
Blend Door Actuator Driver Side Circuit
B0836 low
Blend Door Actuator Driver Side Open
B0837 low
Blend Door Actuator Driver Side Short
B0838 low
Blend Door Actuator Driver Side Range
B0839 low
Blend Door Actuator Passenger Side Circuit
B0840 low
Blend Door Actuator Passenger Side Open
B0841 low
Blend Door Actuator Passenger Side Short
B0842 low
Blend Door Actuator Passenger Side Range
B0843 low
Mode Door Actuator Circuit Malfunction
B0844 low
Mode Door Actuator Circuit Open
B0845 low
Mode Door Actuator Circuit Short
B0846 low
Mode Door Actuator Position Error
B0847 low
Defrost Door Actuator Circuit
B0848 low
Defrost Door Actuator Open
B0849 low
Defrost Door Actuator Position Error
B0850 low
Recirculation Door Actuator Circuit
B0851 low
Recirculation Door Actuator Open
B0852 low
Recirculation Door Actuator Position
B0853 low
Rear Blend Door Actuator Circuit
B0854 low
Rear Blend Door Actuator Open
B0855 low
Rear Mode Door Actuator Circuit
B0856 low
Rear Mode Door Actuator Open
B0857 low
Auxiliary Climate Blend Door
B0858 low
Auxiliary Climate Mode Door
B0859 low
Floor/Panel Door Actuator
B0860 low
Blower Motor Circuit Malfunction
B0861 low
Blower Motor Circuit Open
B0862 low
Blower Motor Circuit Short to Ground
B0863 low
Blower Motor Circuit Short to Battery
B0864 low
Blower Motor Speed Control Circuit
B0865 low
Blower Motor Resistor Circuit
B0866 low
Blower Motor Relay Circuit
B0867 low
Blower Motor Relay Open
B0868 low
Blower Motor Speed Feedback
B0869 low
Blower Motor Thermal Protection
B0870 low
Rear Blower Motor Circuit
B0871 low
Rear Blower Motor Open
B0872 low
Rear Blower Motor Speed Control
B0873 low
Rear Blower Motor Relay
B0874 low
Blower Motor Controller Module
B0875 low
Cabin Fan Speed Sensor
B0876 low
HVAC Blower Voltage Supply
B0877 low
Blower Motor Ground Circuit
B0878 low
Auxiliary Blower Motor Circuit
B0879 low
Blower Motor Noise Sensor
B0880 low
Cabin Air Quality Sensor Circuit
B0881 low
Cabin Air Quality Sensor Open
B0882 low
Cabin Air Quality Sensor Short
B0883 low
Cabin Air Quality Sensor Range
B0884 low
Cabin CO2 Sensor Circuit
B0885 low
Cabin CO2 Sensor Range
B0886 low
Cabin Humidity Sensor Circuit
B0887 low
Cabin Humidity Sensor Range
B0888 low
Cabin Particulate Sensor Circuit
B0889 low
Cabin Particulate Sensor Range
B0890 low
Cabin Ionizer Circuit
B0891 low
Cabin Ionizer Module Fault
B0892 low
Cabin Air Purifier Circuit
B0893 low
Cabin Air Purifier Filter Sensor
B0894 low
Cabin Fragrance Dispenser Circuit
B0895 low
Cabin Fragrance Level Sensor
B0896 low
Cabin Air Recirculation Quality Sensor
B0897 low
Auto Recirculation System Fault
B0898 low
Biodefense Mode Circuit
B0899 low
Cabin HEPA Filter Monitor