
DTC Anatomy
Types of DTC's
There are two categories of DTC's that apply to OBDII. They are listed below with Type A being the more severe.
Type A
Emissions related.
Requests illumination of the MIL after one failed driving cycle.
Stores a freeze frame DTC after one failed driving cycle.
Type B
Emissions related.
Sets a Pending Trouble Code after one failed driving cycle.
Clears a Pending Trouble Code after one successful driving cycle.
Turns on the MIL after two consecutive failed driving cycles.
Stores a freeze frame after two consecutive failed driving...