July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Code Enable Criteria

Engine run time is greater than one minute.
No CMP, CKP, ECT, EGR, EVAP purge solenoid, fuel trim, IAT, MAP, misfire, system voltage, or TP sensor DTCs are set.

DTC sets when O2S1 voltage is inactive (not reading outside 391-491 millivolts) for greater than 90 seconds.