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Catalytic Converter Monitor and Readiness Code: Procedure

WARNING: This page is about a different car, the 2006 Acura MDX, 2005 Acura MDX, 2004 Acura MDX, and 2003 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Connect the HDS to the vehicle's data link connector (DLC), and bring up the OBD status screen for DTC P0420 in the DTC MENU.
  2. Start the engine.
  3. Test-drive the vehicle under stop-and-go conditions with short periods of steady cruise. After about 5 miles (8 km), the readiness code should switch to passed.
  4. If the readiness code is still set to not complete, check for a Temporary DTC with the HDS. If there is no DTC, one or more of the enable criteria were probably not met. Repeat the procedure.
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