Honda Accord Hybrid 2015 Quick Reference Manual page 551

uuEmissions TestinguTesting of Readiness Codes
5. Select a nearby, lightly traveled major highway where you can maintain a speed
of 50 to 60 mph (80 to 97 km/h) for at least 20 minutes. Drive on the highway in
( D . Do not use cruise control. When traffic allows, drive for 90 seconds without
moving the accelerator pedal. (Vehicle speed may vary slightly; this is okay.) If you
cannot do this for a continuous 90 seconds because of traffic conditions, drive for
at least 30 seconds, then repeat it two more times (for a total of 90 seconds).
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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