Creator
OBDII/EOBD scanner
10
2) O2 Sensors
3) Catalyst
4) Evaporative System
5) O2 Sensor Heater
6) Secondary air
7) Heated Catalyst
8) A/C system
2.5 OBD II Monitor Readiness Statuses
OBD II systems must indicate whether or not
the vehicle’s PCM’s monitor system has
completed
testing
on
each
component.
Components that have been tested will be
reported as “Ready”,
or
“complete”,
meaning they have been tested by the OBD II
system. The purpose of recording readiness
states is to allow inspectors to determine if
vehicle’s OBD II system has tested all the
components and/or systems.
The power train control module (PCM) sets a
monitor to “Ready” or “Complete”, it will
remain in this state. A number of factors,
including erasing of diagnostic trouble codes
(DTCs) with a scan tool or a disconnected
battery, can result in Readiness Monitors
being set to “Not ready”. Since the three
continuous monitors are constantly
evaluating, they will be reported as
