Before 1996 On Board Diagnostics (OBD) was the wild west of the automotive world. Manufacturers
were free to implement any system they could dream up. The EPA standardized PCM design in
1996 with the implementation of OBDII for all cars sold in the US. The immediate benefit was that
any OBDII scanner would work on any OBDII compliant vehicle and all generic fault codes would be
the same for all cars. Most Diagnostic Trouble Codes (DTCs) are of the form P0xxx. "P" for powertrain
and "0" for generic.


These are the P01xx DTCs for my Tracker but they are valid for every
OBDII car. P0101 indicates a problem with the MAF sensor for everyone.


These are the generic P0300/400/500 codes for my Tracker


These are my generic P0600 AND 700 DTCs.


These are the 2001 Tracker specific "P" codes. For my car,
P1408 indicates a problem with the Manifold Absolute
Pressure (MAP) sensor. In a Ford, P1408 signals a
problem with the EGR valve. In a BMW, P1408 is a
"Tank Fill Level Left Signal" problem.


These are all the "C" (chassis) codes for my Tracker.
Note that they are all Suzuki/Chevy specific. Also note
that not all scanners can read "C" code DTCs.


These are my "B" (body) codes. Again all Tracker
specific and not all scanners can read body codes.