B Codes
B codes are part of the OBD-II diagnostic system and relate to body systems in the vehicle. These include electronic features like airbags, lighting, climate control, and other comfort or safety systems. B codes are essential for diagnosing non-powertrain electronic malfunctions. They are classified into several groups to help technicians pinpoint the source of the issue more effectively:
- B0XXX – Body Systems
- B1XXX – Manufacturer Controlled DTC
- B2XXX – Manufacturer Controlled DTC
- B3XXX – ISO/SAE Reserved
| DTC Number | DTC Naming | Location |
| B0000 | ISO/SAE Reserved | |
| B0001 | Driver Frontal Stage 1 Deployment Control (Subfault) | |
| B0002 | Driver Frontal Stage 2 Deployment Control (Subfault) | |
| B0003 | Driver Frontal Stage 3 Deployment Control (Subfault) | |
| B0004 | Driver Knee Bolster Deployment Control (Subfault) | |
| B0005 | Collapsible Steering Column Deployment Control (Subfault) | |
| B0006 | ISO/SAE Reserved | |
| B0007 | ISO/SAE Reserved | |
| B0008 | ISO/SAE Reserved | |
| B0009 | ISO/SAE Reserved | |
| B000A | ISO/SAE Reserved | |
| B000B | ISO/SAE Reserved | |
| B000C | ISO/SAE Reserved | |
| B000D | ISO/SAE Reserved | |
| B000E | ISO/SAE Reserved | |
| B000F | ISO/SAE Reserved | |
| B0010 | Passenger Frontal Stage 1 Deployment Control (Subfault) | |
| B0011 | Passenger Frontal Stage 2 Deployment Control (Subfault) | |
| B0012 | Passenger Frontal Stage 3 Deployment Control (Subfault) | |
| B0013 | Passenger Knee Bolster Deployment Control (Subfault) | |
| B0014 | ISO/SAE Reserved | |
| B0015 | ISO/SAE Reserved | |
| B0016 | ISO/SAE Reserved | |
| B0017 | ISO/SAE Reserved | |
| B0018 | ISO/SAE Reserved | |
| B0019 | ISO/SAE Reserved | |
| B001A | ISO/SAE Reserved | |
| B001B | ISO/SAE Reserved | |
| B001C | ISO/SAE Reserved | |
| B001D | ISO/SAE Reserved | |
| B001E | ISO/SAE Reserved | |
| B001F | ISO/SAE Reserved | |
| B0020 | Left Side Airbag Deployment Control (Subfault) | |
| B0021 | Left Curtain Deployment Control 1 (Subfault) | |
| B0022 | Left Curtain Deployment Control 2 (Subfault) | |
| B0023 | ISO/SAE Reserved | |
| B0024 | ISO/SAE Reserved | |
| B0025 | ISO/SAE Reserved | |
| B0026 | ISO/SAE Reserved | |
| B0027 | ISO/SAE Reserved | |
| B0028 | Right Side Airbag Deployment Control (Subfault) | |
| B0029 | Right Curtain Deployment Control 1 (Subfault) | |
| B002A | Right Curtain Deployment Control 2 (Subfault) | |
| B002B | ISO/SAE Reserved | |
| B002C | ISO/SAE Reserved | |
| B002D | ISO/SAE Reserved | |
| B002E | ISO/SAE Reserved | |
| B002F | ISO/SAE Reserved | |
| B0030 | Second Row Left Side Airbag Deployment Control (Subfault) | |
| B0031 | Second Row Left Frontal Stage 1 Deployment Control (Subfault) | |
| B0032 | Second Row Left Frontal Stage 2 Deployment Control (Subfault) | |
| B0033 | Second Row Left Frontal Stage 3 Deployment Control (Subfault) | |
| B0034 | ISO/SAE Reserved | |
| B0035 | ISO/SAE Reserved | |
| B0036 | ISO/SAE Reserved | |
| B0037 | ISO/SAE Reserved | |
| B0038 | Second Row Right Side Airbag Deployment Control (Subfault) | |
| B0039 | Second Row Right Frontal Stage 1 Deployment Control (Subfault) | |
| B003A | Second Row Right Frontal Stage 2 Deployment Control (Subfault) | |
| B003B | Second Row Right Frontal Stage 3 Deployment Control (Subfault) | |
| B003C | ISO/SAE Reserved | |
| B003D | ISO/SAE Reserved | |
| B003E | ISO/SAE Reserved | |
| B003F | ISO/SAE Reserved | |
| B0040 | Third Row Left Side Airbag Deployment Control (Subfault) | |
| B0041 | Third Row Left Frontal Stage 1 Deployment Control (Subfault) | |
| B0042 | Third Row Left Frontal Stage 2 Deployment Control (Subfault) | |
| B0043 | Third Row Left Frontal Stage 3 Deployment Control (Subfault) | |
| B0044 | ISO/SAE Reserved | |
| B0045 | ISO/SAE Reserved | |
| B0046 | ISO/SAE Reserved | |
| B0047 | ISO/SAE Reserved | |
| B0048 | Third Row Right Side Airbag Deployment Control (Subfault) | |
| B0049 | Third Row Right Frontal Stage 1 Deployment Control (Subfault) | |
| B004A | Third Row Right Frontal Stage 2 Deployment Control (Subfault) | |
| B004B | Third Row Right Frontal Stage 3 Deployment Control (Subfault) | |
| B004C | ISO/SAE Reserved | |
| B004D | ISO/SAE Reserved | |
| B004E | ISO/SAE Reserved | |
| B004F | ISO/SAE Reserved | |
| B0050 | Driver Seatbelt Sensor (Subfault) | |
| B0051 | First Row Center Seatbelt Sensor (Subfault) | |
| B005A | ISO/SAE Reserved | |
| B005B | ISO/SAE Reserved | |
| B005C | ISO/SAE Reserved | |
| B005D | ISO/SAE Reserved | |
| B005E | ISO/SAE Reserved | |
| B005F | ISO/SAE Reserved | |
| B0060 | Driver Seatbelt Tension Sensor (Subfault) | |
| B0061 | Passenger Seatbelt Tension Sensor (Subfault) | |
| B0062 | ISO/SAE Reserved | |
| B0063 | ISO/SAE Reserved | |
| B0064 | ISO/SAE Reserved | |
| B0065 | ISO/SAE Reserved | |
| B0066 | ISO/SAE Reserved | |
| B0067 | ISO/SAE Reserved | |
| B0068 | ISO/SAE Reserved | |
| B0069 | ISO/SAE Reserved | |
| B006A | ISO/SAE Reserved | |
| B006B | ISO/SAE Reserved | |
| B006C | ISO/SAE Reserved | |
| B006D | ISO/SAE Reserved | |
| B006E | ISO/SAE Reserved | |
| B006F | ISO/SAE Reserved | |
| B0070 | Driver Seatbelt Pretensioner "A" Deployment Control (Subfault) | |
| B0071 | First Row Center Seatbelt Pretensioner Deployment Control (Subfault) | |
| B0072 | Passenger Seatbelt Pretensioner "A" Deployment Control (Subfault) | |
| B0073 | Second Row Left Seatbelt Pretensioner Deployment Control (Subfault) | |
| B0074 | Second Row Center Seatbelt Pretensioner Deployment Control (Subfault) | |
| B0075 | Second Row Right Seatbelt Pretensioner Deployment Control (Subfault) | |
| B0076 | Third Row Left Seatbelt Pretensioner Deployment Control (Subfault) | |
| B0077 | Third Row Center Seatbelt Pretensioner Deployment Control (Subfault) | |
| B0078 | Third Row Right Seatbelt Pretensioner Deployment Control (Subfault) | |
| B0079 | Driver Seatbelt Pretensioner "B" Deployment Control (Subfault) | |
| B007A | Passenger Seatbelt Pretensioner "B" Deployment Control (Subfault) | |
| B007B | Second Row Left Seatbelt Pretensioner "B" Deployment Control (Subfault) | |
| B007C | Second Row Right Seatbelt Pretensioner "B" Deployment Control (Subfault) | |
| B007D | Second Row Center Seatbelt Pretensioner "B" Deployment Control (Subfault) | |
| B007E | Driver Seatbelt Pretensioner "C" Deployment Control (Subfault) | |
| B007F | Passenger Seatbelt Pretensioner "C" Deployment Control (Subfault) | |
| B0080 | Driver Seatbelt Load Limiter Deployment Control (Subfault) | |
| B0081 | First Row Center Seatbelt Load Limiter Deployment Control (Subfault) | |
| B0082 | Passenger Seatbelt Load Limiter Deployment Control (Subfault) | |
| B0083 | Second Row Left Seatbelt Load Limiter Deployment Control (Subfault) | |
| B0084 | Second Row Center Seatbelt Load Limiter Deployment Control (Subfault) | |
| B0085 | Second Row Right Seatbelt Load Limiter Deployment Control (Subfault) | |
| B0086 | Third Row Left Seatbelt Load Limiter Deployment Control (Subfault) | |
| B0087 | Third Row Center Seatbelt Load Limiter Deployment Control (Subfault) | |
| B0088 | Third Row Right Seatbelt Load Limiter Deployment Control (Subfault) | |
| B0089 | ISO/SAE Reserved | |
| B008A | ISO/SAE Reserved | |
| B008B | ISO/SAE Reserved | |
| B008C | ISO/SAE Reserved | |
| B008D | ISO/SAE Reserved | |
| B008E | ISO/SAE Reserved | |
| B008F | ISO/SAE Reserved | |
| B0090 | Left Frontal Restraints Sensor (Subfault) | |
| B0091 | Left Side Restraints Sensor 1 (Subfault) | |
| B0092 | Left Side Restraints Sensor 2 (Subfault) | |
| B0093 | Left Side Restraints Sensor 3 (Subfault) | |
| B0094 | Center Frontal Restraints Sensor (Subfault) | |
| B0095 | Right Frontal Restraints Sensor (Subfault) | |
| B0096 | Right Side Restraints Sensor 1 (Subfault) | |
| B0097 | Right Side Restraints Sensor 2 (Subfault) | |
| B0098 | Right Side Restraints Sensor 3 (Subfault) | |
| B0099 | Roll Over Sensor (Subfault) | |
| B009A | Left Side Restraints Sensor 4 (Subfault) | |
| B009B | Left Side Restraints Sensor 5 (Subfault) | |
| B009C | Left Side Restraints Sensor 6 (Subfault) | |
| B009D | Right Side Restraints Sensor 4 (Subfault) | |
| B009E | Right Side Restraints Sensor 5 (Subfault) | |
| B009F | Right Side Restraints Sensor 6 (Subfault) | |
| B00A0 | Occupant Classification System (Subfault) | |
| B00A1 | Occupant Position System (Subfault) | |
| B00A2 | ISO/SAE Reserved | |
| B00A3 | ISO/SAE Reserved | |
| B00A4 | ISO/SAE Reserved | |
| B00A5 | ISO/SAE Reserved | |
| B00A6 | ISO/SAE Reserved | |
| B00A7 | ISO/SAE Reserved | |
| B00A8 | ISO/SAE Reserved | |
| B00A9 | ISO/SAE Reserved | |
| B00AA | ISO/SAE Reserved | |
| B00AB | ISO/SAE Reserved | |
| B00AC | ISO/SAE Reserved | |
| B00AD | ISO/SAE Reserved | |
| B00AE | ISO/SAE Reserved | |
| B00AF | ISO/SAE Reserved | |
| B00B0 | Driver Seat Occupant Classification Sensor "A" (Subfault) | |
| B00B1 | Driver Seat Occupant Classification Sensor "B" (Subfault) | |
| B00B2 | Driver Seat Occupant Classification Sensor "C" (Subfault) | |
| B00B3 | Driver Seat Occupant Classification Sensor "D" (Subfault) | |
| B00B4 | Driver Seat Occupant Classification Sensor "E" (Subfault) | |
| B00B5 | Driver Seat Track Position Restraints Sensor (Subfault) | |
| B00B6 | Driver Seat Recline Position Restraints Sensor (Subfault) | |
| B00B7 | Driver Seat Occupant Position Sensor "A" (Subfault) | |
| B00B8 | Driver Seat Occupant Position Sensor "B" (Subfault) | |
| B00B9 | Driver Seat Occupant Position Sensor "C" (Subfault) | |
| B00BA | Driver Seat Occupant Position Sensor "D" (Subfault) | |
| B00BB | Driver Seat Occupant Position Sensor "E" (Subfault) | |
| B00BC | ISO/SAE Reserved | |
| B00BD | ISO/SAE Reserved | |
| B00BE | ISO/SAE Reserved | |
| B00BF | ISO/SAE Reserved | |
| B00C0 | Passenger Seat Occupant Classification Sensor "A" (Subfault) | |
| B00C1 | Passenger Seat Occupant Classification Sensor "B" (Subfault) | |
| B00C2 | Passenger Seat Occupant Classification Sensor "C" (Subfault) | |
| B00C3 | Passenger Seat Occupant Classification Sensor "D" (Subfault) | |
| B00C4 | Passenger Seat Occupant Classification Sensor "E" (Subfault) | |
| B00C5 | Passenger Seat Track Position Restraints Sensor (Subfault) | |
| B00C6 | Passenger Seat Recline Position Restraints Sensor (Subfault) | |
| B00C7 | Passenger Seat Occupant Position Sensor "A" (Subfault) | |
| B00C8 | Passenger Seat Occupant Position Sensor "B" (Subfault) | |
| B00C9 | Passenger Seat Occupant Position Sensor "C" (Subfault) | |
| B00CA | Passenger Seat Occupant Position Sensor "D" (Subfault) | |
| B00CC | ISO/SAE Reserved | |
| B00CD | ISO/SAE Reserved | |
| B00CE | ISO/SAE Reserved | |
| B00CF | ISO/SAE Reserved | |
| B00D0 | Driver Seatbelt Indicator (Subfault) | |
| B00D1 | Passenger Seatbelt Indicator (Subfault) | |
| B00D2 | Restraint System Malfunction Indicator 1 (Subfault) | |
| B00D3 | Restraint System Malfunction Indicator 2 (Subfault) | |
| B00D4 | Restraint System Malfunction Audible Indicator (Subfault) | |
| B00D5 | Restraint System Passenger Disable Indicator (Subfault) | |
| B00D6 | ISO/SAE Reserved | |
| B00D7 | ISO/SAE Reserved | |
| B00D8 | ISO/SAE Reserved | |
| B00D9 | ISO/SAE Reserved | |
| B00DA | ISO/SAE Reserved | |
| B00DB | ISO/SAE Reserved | |
| B00DC | ISO/SAE Reserved | |
| B00DD | ISO/SAE Reserved | |
| B00DE | ISO/SAE Reserved | |
| B00DF | Passenger Restraints Disable Switch (Subfault) | |
| B00E0 | Third Row Left Seatbelt Pretensioner "B" Deployment Control (Subfault) | |
| B00E1 | Third Row Right Seatbelt Pretensioner "B" Deployment Control (Subfault) | |
| B00E2 | Third Row Center Seatbelt Pretensioner "B" Deployment Control (Subfault) | |
| B00E3 | Second Row Left Seatbelt Pretensioner "C" Deployment Control (Subfault) | |
| B00E4 | Second Row Right Seatbelt Pretensioner "C" Deployment Control (Subfault) | |
| B00E5 | Second Row Center Seatbelt Pretensioner "C" Deployment Control (Subfault) | |
| B00E6 | Third Row Right Seatbelt Pretensioner "C" Deployment Control (Subfault) | |
| B00E7 | Third Row Left Seatbelt Pretensioner "C" Deployment Control (Subfault) | |
| B00E8 | Third Row Center Seatbelt Pretensioner "C" Deployment Control (Subfault) | |
| B00E9 - B0FF | ISO/SAE Reserved | |
| B1000 | Manufacturer Controlled DTC | |
| B2000 | Manufacturer Controlled DTC | |
| B3000 | ISO/SAE Reserved |