Getting Started

OBD II Diagnostic Trouble Codes (DTCs)

DTCs are used to help determine the cause of a problem or problems with a vehicle.

DTCs consist of a five-digit alphanumeric code.

The DTCs format and general code types are shown below.

.

 

 

 

Bx - Body

P 0 1 0 1

2

Cx - Chassis

 

 

 

Px - Powertrain

 

Specific Fault Designation

 

Ux - Network Comm.

 

 

 

 

 

x = 0, 1, 2 or 3

 

 

 

 

 

Vehicle Specific System

 

Example:

 

 

 

P0101 - Mass or Volume Air Flow Circuit Range/Performance Problem

 

Powertrain Codes

 

Body Codes

 

P0xxx - Generic (SAE)

 

B0xxx - Generic (SAE)

 

P1xxx - Manufacturer Specific

B1xxx - Manufacturer Specific

 

P2xxx - Generic (SAE)

 

B2xxx - Manufacturer Specific

 

P30xx-P33xx- Manufacturer Specific

B3xxx - Generic (SAE)

 

P34xx-P39xx- Generic (SAE)

Network Communication Codes

 

Chassis Codes

 

U0xxx - Generic (SAE)

 

C0xxx - Generic (SAE)

 

U1xxx - Manufacturer Specific

 

C1xxx - Manufacturer Specific

U2xxx - Manufacturer Specific

 

C2xxx - Manufacturer Specific

U3xxx - Generic (SAE)

 

C3xxx - Generic (SAE)

 

 

 

Within each category (Powertrain, Chassis, Body and Network) of DTCs there are assigned ranges for different vehicle systems.

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Actron CP9190 manual OBD II Diagnostic Trouble Codes DTCs, 1 0