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OBD2 Trouble Code Info

OBD2 Trouble Code Info

OBDII Code Info

If your diagnostic connector looks

like this one,then you have an OBDII

sytem,and it requires ascanner to

access the codes.Scanners can be

found from the links on the

homepage.All vehiclesafter 96 have

the OBDII systems and some 95 models,too.

Pin 2 – J1850 Bus+

Pin 4 – Chassis Ground

Pin 5 – Signal Ground

Pin 6 – CAN High (J-2284)

Pin 7 – ISO 9141-2 K Line

Pin 10 – J1850 Bus

Pin 14 – CAN Low (J-2284)

Pin 15 – ISO 9141-2 L Line

Pin 16 – Battery Power

Some 1995 GM vehicles have the 16-pin

connector but have accessible OBD-I

codes. Check theunderhood emissions

sticker to confirm, and if yours is OBD-I,

the codes are accessed bybridging

terminals 5 and 6. If your vehicle is

OBD-II, a scan tool or computer is

required toaccess the codes.

P 0 1 0 1

1 2 3 4 5

1st digit

P = powertrain

B = Body

C = Chassis


2nd digit

0 = Standard

1 = Manufacturer specific


3rd digit

1 = Emission management

2 = Injector circuit

3 = Ignition

4 = Auxiliary emission

5 = Vehicle speed & idle control

6 = Computer & output circuit

7 = Transmission