This bulletin applies to 2013-2016 Honda Accord, 2010-2015 Crosstour, 2011-2016 Odyssey and 2009-2015 Pilot vehicles. While driving under steady cruise between 30 and 65 mph or during light acceleration, if the engine intermittently rattles or runs rough with the MIL blinking, the likely cause is sticking VCM rocker arms.
This noise can be quite noticeable. What you’re hearing is the VCM rocker arm pin tapping against the other rocker arm as it tries to lock the two arms together going into valve pause. The VCM rocker arm pin can also stick in its locked position, causing both rocker arms to stay connected. When this happens, the engine intermittently runs rough and the MIL blinks. If the engine is shut off and then restarted when either of these symptoms occurs, the rocker arms may unstick, allowing normal operation with no misfire DTCs being set, which can make this problem difficult to diagnose.
Be sure to check out the Variable Cylinder Management Rocker Arm test in the service manual. This will help you determine if the rocker arms are working properly. Replacing the affected rocker arm(s) usually fixes the problem.