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
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