Setting The Record Straight On Readiness Monitors And On-Board Diagnostics (OBDII) Inspections
Readiness Monitor Status
Where is Readiness Monitor Status on the Vehicle Inspection Report (VIR)?
Remember Effective October 15, 2008:
For vehicles year model 2001 and newer, we allow one (1) non-continuous monitor to be "Not Ready" and still pass the test, but two (2) or more "Not Ready" readings will cause the vehicle to fail.
For vehicles year model 1996 – 2000, we allow two (2) non-continuous monitors to be "Not Ready" and still pass the test, but three (3) or more "Not Ready" readings will cause the vehicle to fail.
|Emissions Test Results|
|MIL CMND Status: OFF||Misfire:||Ready||Heated Cat:||N/S||02Sensor||Not Ready|
|Fuel Sys:||Ready||Evap:||Ready||02 Sensor Htr:||Ready|
|MIL Engine On: PASS||Comp Cmpnt:||Ready||2nd Sys:||Ready||EGR Sys:||Not Ready|
|MIL Engine Off: PASS||Catalyst:||Not Ready||Air Cond:||N/S|
|Overall Result - FAIL|
Changing the monitor(s) to "Ready"
If you don't have access to drive cycles/drive traces, they should be available from a qualified service technician or dealership.
With a generic OBDII scan tool*, verify the monitors are "Ready" before returning the vehicle to the customer.
*Vehicle manufacturer specific scan tools must be in the global OBDII or generic OBDII mode to display readiness monitor status.
If the vehicle has DTCs stored, and the MIL is commanded on:
If you've cleared the DTCs (using a scan tool or disconnecting the battery), monitors will reset to "Not Ready".
Driving the vehicle through the drive cycle/drive trace will set the monitors back to "Ready" and verify that the repairs were effective.
With a generic OBDII scan tool, verify the monitors are "Ready" before returning the vehicle to the customer.