Air Fuel Ratio (A/F) Sensor Heater Monitor Readiness Code: Procedure

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

Start the engine, and let it idle for 1 minute. The readiness code should switch from incomplete to complete.
If the readiness code is still not set to complete, check for a Pending DTC. If there is no DTC, repeat the procedure.