OBD2 Reference Table
Purpose
To provide a table listing of OBD2.
OBD2 Reference Table
The table below lists current OBD2 Monitors and indicates the following for each Monitor:
A. Monitor Type (how often does the Monitor run; Continuous or Once per trip)
B. Number of trips needed, with a fault present, to set a pending DTC
C. Number of consecutive trips needed, with a fault present, to command the MIL “On” and store a DTC
D. Number of trips needed, with no faults present, to erase a Pending DTC
E. Number and type of trips or drive cycles needed, with no faults present, to turn off the MIL
F. Number of warm-up periods needed to erase the DTC from the computer’s memory after the MIL is turned off
| Name of Monitor | A | B | C | D | E | F |
| Comprehensive Component Monitor | Continuous | 1 | 2 | 1 | 3 | 40 |
| Misfire Monitor (Type 1 and 3) | Continuous | 1 | 2 | 1 | 3 - similar conditions | 80 |
| Misfire Monitor (Type 2) | Continuous | 1 | 3 - similar conditions | 80 | ||
| Fuel System Monitor | Continuous | 1 | 1 or 2 | 1 | 3 - similar conditions | 80 |
| Catalytic Converter Monitor | Once per trip | 1 | 2 | 1 | 3 trips | 40 |
| Oxygen Sensor Monitor | Once per trip | 1 | 2 | 1 | 3 trips | 40 |
| Oxygen Sensor Heater Monitor | Once per trip | 1 | 2 | 1 | 3 trips | 40 |
| Exhaust Gas Recirculation (EGR) Monitor | Once per trip | 1 | 2 | 1 | 3 trips | 40 |
| Evaporative Emissions Controls Monitor | Once per trip | 1 | 2 | 1 | 3 trips | 40 |
| Secondary Air System (AIR) Monitor | Once per trip | 1 | 2 | 1 | 3 trips | 40 |
| NMHC Monitor | Once per trip | 1 | 2 | 1 | 3 trips | 40 |
| Nox Adsorber Monitor | Once per trip | 1 | 2 | 1 | 3 trips | 40 |
| Boost Pressure System Monitor | Once per trip | 1 | 2 | 1 | 3 trips | 40 |
| Exhaust Gas Sensor Monitor | Once per trip | 1 | 2 | 1 | 3 trips | 40 |
| PM Filter Monitor | Once per trip | 1 | 2 | 1 | 3 trips | 40 |