Onboard Diagnostics
OBD2 MONITORS
12
Oxygen Sensor Monitor
Oxygen Sensor Heater Monitor
Catalyst Monitor
Heated Catalyst Monitor
EGR System Monitor
EVAP System Monitor
Secondary Air System Monitor
The following Monitors will be standard beginning in 2010. The
majority of vehicles produced before this time will not support
these Monitors
NMHC Monitor
NOx Adsorber Monitor
Boost Pressure System Monitor
Exhaust Gas Sensor Monitor
PM Filter Monitor
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
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