Honda Acura RLX Hybrid 2016 Owner's Manual page 563

uuEmissions TestinguTesting of Readiness Codes
5. Select a nearby, lightly traveled major highway where you can maintain a speed
of 50 mph (80 km/h) over for at least 20 minutes. Drive on the highway in
with SPORT mode. Do not use cruise control.
6. Drive in city/suburban traffic for at least 10 minutes. When traffic conditions
allow, let the vehicle coast for several seconds without using the accelerator pedal
or the brake pedal.
7. Park the vehicle and leave the power system off for 40 minutes.
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