OBDII Code Definition

OBDII DTCs are formatted with a three digit hexadecimal code preceded by an alphanumeric designator. The designator defines the system affected as well as if the code is ISO/SAE or manufacturer controlled.

Body Systems

• B0xxx - ISO/SAE Controlled
• B1xxx - Manufacturer Controlled
• B2xxx - Manufacturer Controlled
• B3xxx - Reserved

Chassis Systems

• C0xxx - ISO/SAE Controlled
• C1xxx - Manufacturer Controlled
• C2xxx - Manufacturer Controlled
• C3xxx - Reserved

Powertrain Systems

• P0xxx - ISO/SAE Controlled
• P1xxx - Manufacturer Controlled
• P2xxx - ISO/SAE Controlled
• P3xxx - Manufacturer Controlled and ISO/SAE Reserved

Network Systems

• U0xxx - ISO/SAE Controlled
• U1xxx - Manufacturer Controlled
• U2xxx - Manufacturer Controlled
• U3xxx - Manufacturer Controlled and ISO/SAE Reserved