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Honda OBD II Emission Monitor Status Readiness Code Checking Using the Instrument Cluster

Confirming passed / Not Passed Status of Emission Monitors


Honda vehicles can display OBD II emission monitor status (complete or incomplete) using the instrument cluster malfunction indicator lamp MIL.

This is a quick way to confirm all emission monitors have passed or have yet to pass. Also referred to as complete or incomplete emission monitors or readiness codes.

1 Beginning with the ignition OFF, Turn ignition ON with the engine OFF

2 The MIL will illuminate and remain ON steady for 20 seconds if all monitors are complete

3 If one or more monitors are incomplete, the MIL will turn ON steady for 20 seconds and blink five times

4 To determine which monitors are incomplete, connect an OBD II scan tool and check monitor status