C09xx OBD-II Codes (C0900–C0999)

100 fault codes in the C09xx range. Click any code for causes, diagnostic steps, severity, and common fixes.

C0900 moderate
Brake Pad Wear Sensor Circuit - Front Left
C0901 moderate
Brake Pad Wear Sensor Circuit - Front Right
C0902 moderate
Brake Pad Wear Sensor Circuit - Rear Left
C0903 moderate
Brake Pad Wear Sensor Circuit - Rear Right
C0904 moderate
Brake Pad Wear Sensor Open - Front Left
C0905 moderate
Brake Pad Wear Sensor Open - Front Right
C0906 moderate
Brake Pad Wear Sensor Open - Rear Left
C0907 moderate
Brake Pad Wear Sensor Open - Rear Right
C0908 critical
Brake Pad Minimum Thickness - Front Left
C0909 critical
Brake Pad Minimum Thickness - Front Right
C0910 critical
Brake Pad Minimum Thickness - Rear Left
C0911 critical
Brake Pad Minimum Thickness - Rear Right
C0912 moderate
Brake Pad Wear Sensor Short - Front Left
C0913 moderate
Brake Pad Wear Sensor Short - Front Right
C0914 moderate
Brake Pad Wear Sensor Short - Rear Left
C0915 moderate
Brake Pad Wear Sensor Short - Rear Right
C0916 critical
Brake Pad Temperature High - Front Left
C0917 critical
Brake Pad Temperature High - Front Right
C0918 critical
Brake Pad Temperature High - Rear Left
C0919 critical
Brake Pad Temperature High - Rear Right
C0920 critical
Brake Rotor Minimum Thickness - Front Left
C0921 critical
Brake Rotor Minimum Thickness - Front Right
C0922 critical
Brake Rotor Minimum Thickness - Rear Left
C0923 critical
Brake Rotor Minimum Thickness - Rear Right
C0924 moderate
Brake Rotor Runout Excessive - Front Left
C0925 moderate
Brake Rotor Runout Excessive - Front Right
C0926 moderate
Brake Rotor Runout Excessive - Rear Left
C0927 moderate
Brake Rotor Runout Excessive - Rear Right
C0928 moderate
Brake Rotor Temperature Sensor - Front Left
C0929 moderate
Brake Rotor Temperature Sensor - Front Right
C0930 moderate
Brake Rotor Temperature Sensor - Rear Left
C0931 moderate
Brake Rotor Temperature Sensor - Rear Right
C0932 critical
Brake Rotor Temperature High - Front Left
C0933 critical
Brake Rotor Temperature High - Front Right
C0934 critical
Brake Rotor Temperature High - Rear Left
C0935 critical
Brake Rotor Temperature High - Rear Right
C0936 moderate
Brake Rotor Warped - Front Left
C0937 moderate
Brake Rotor Warped - Front Right
C0938 moderate
Brake Rotor Warped - Rear Left
C0939 moderate
Brake Rotor Warped - Rear Right
C0940 critical
Brake Caliper Malfunction - Front Left
C0941 critical
Brake Caliper Malfunction - Front Right
C0942 critical
Brake Caliper Malfunction - Rear Left
C0943 critical
Brake Caliper Malfunction - Rear Right
C0944 critical
Brake Caliper Stuck Applied - Front Left
C0945 critical
Brake Caliper Stuck Applied - Front Right
C0946 critical
Brake Caliper Stuck Applied - Rear Left
C0947 critical
Brake Caliper Stuck Applied - Rear Right
C0948 critical
Brake Caliper Stuck Released - Front Left
C0949 critical
Brake Caliper Stuck Released - Front Right
C0950 critical
Brake Caliper Stuck Released - Rear Left
C0951 critical
Brake Caliper Stuck Released - Rear Right
C0952 critical
Brake Caliper Piston Seal Leak - Front Left
C0953 critical
Brake Caliper Piston Seal Leak - Front Right
C0954 critical
Brake Caliper Piston Seal Leak - Rear Left
C0955 critical
Brake Caliper Piston Seal Leak - Rear Right
C0956 critical
Brake Caliper Slide Pin Seized - Front Left
C0957 critical
Brake Caliper Slide Pin Seized - Front Right
C0958 critical
Brake Caliper Slide Pin Seized - Rear Left
C0959 critical
Brake Caliper Slide Pin Seized - Rear Right
C0960 moderate
Master Cylinder Pressure Sensor Circuit
C0961 moderate
Master Cylinder Pressure Sensor Low
C0962 moderate
Master Cylinder Pressure Sensor High
C0963 moderate
Master Cylinder Pressure Sensor Range
C0964 critical
Master Cylinder Internal Leak
C0965 critical
Master Cylinder Primary Circuit Fault
C0966 critical
Master Cylinder Secondary Circuit Fault
C0967 moderate
Master Cylinder Fluid Level Switch
C0968 moderate
Master Cylinder Fluid Level Low
C0969 moderate
Master Cylinder Performance Degraded
C0970 moderate
Brake Booster Check Valve Fault
C0971 moderate
Brake Booster Vacuum Hose Leak
C0972 moderate
Brake Fluid Contamination Detected
C0973 moderate
Brake Fluid Moisture Content High
C0974 moderate
Brake Fluid Temperature Sensor
C0975 moderate
Brake Fluid Temperature Too High
C0976 moderate
Brake Fluid Condition Monitor
C0977 moderate
Brake Proportioning Valve Front Bias
C0978 moderate
Brake Proportioning Valve Rear Bias
C0979 moderate
Brake Pressure Distribution Error
C0980 low
Brake Line Pressure Sensor - Front Left
C0981 low
Brake Line Pressure Sensor - Front Right
C0982 low
Brake Line Pressure Sensor - Rear Left
C0983 low
Brake Line Pressure Sensor - Rear Right
C0984 critical
Brake Line Restriction Detected - Front
C0985 critical
Brake Line Restriction Detected - Rear
C0986 low
Brake Hose Expansion Detected
C0987 moderate
Brake System Bleed Required
C0988 moderate
Brake System Air Detected
C0989 critical
Brake System Over-Pressure Warning
C0990 low
Brake Wear Monitoring System Reset
C0991 low
Brake Component Life Monitor
C0992 low
Brake Fluid Change Reminder
C0993 low
Brake Service Interval Exceeded
C0994 low
Brake System Self-Test Failure
C0995 low
Brake System Communication Error
C0996 low
Brake System Module Configuration
C0997 low
Brake System Software Update Required
C0998 low
Brake System Performance Degraded
C0999 low
Brake System General Malfunction
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