On-Board Diagnostic – Decoding OBD II Trouble Codes

OBDII Trouble Codes have a strict defined structure.

Example Code P 0 3 01

Column Breakdown Trouble Code SubSystem Type of Code Affected SubSystem Specific component ID in this subsystem

Potential Values

P = Powertrain

B = Body

C = Chassis

U = Network Communication

0 = SAE/Generic

1 = Manufacturer

1 = a Air/Fuel Control imbalance

2 = a Fuel (injector) problem

3 = an Ignition System Misfire

4 = an auxiliary emission component (/EGR/AIR/CAT/ or /EVAP/ problem)

5 = a vehicle speed/idle control problem

6 = a computer problem

7 = a transaxle/transmission problem

8 = a transaxle/transmission problem

On-Board Diagnostic – Decoding OBD II Trouble Codes

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Example Code	P	0	3	01
Column Breakdown	Trouble Code SubSystem	Type of Code	Affected SubSystem	Specific component ID in this subsystem
Potential Values	P = Powertrain B = Body C = Chassis U = Network Communication	0 = SAE/Generic 1 = Manufacturer	1 = a Air/Fuel Control imbalance 2 = a Fuel (injector) problem 3 = an Ignition System Misfire 4 = an auxiliary emission component (/EGR/AIR/CAT/ or /EVAP/ problem) 5 = a vehicle speed/idle control problem 6 = a computer problem 7 = a transaxle/transmission problem 8 = a transaxle/transmission problem