Subject: Vehicle Readiness

Questions have been raised about OBDII readiness monitors and how vehicles must be operated following OBDII repairs to set the readiness monitors. Required vehicle operation will depend on the specific vehicle make and model as well as other factors.

In general, we suggest you instruct motorists who have vehicles that do not pass OBD II readiness requirements to drive the vehicle for a week under normal conditions and then return the vehicle for retesting.

This will set the readiness monitors on most vehicles, with additional driving typically required for relatively few vehicles. If not, the manufacturer will need to be contacted for specific requirements needed to reset the readiness monitors.

As always, please contact the NHOST Helpline at 800-383-4124 with questions or for assistance.