Scotty, i love your channel! I have a 2012 Honda Odyssey w/130k. Owned since new, always change the oil every 5k.  Just noticed clouds of smoke when the eco comes on and off.  Not every-time but disturbing when it does.  I replaced the PCV valve no change.  Dealer/stealer said it doesn't have codes or misfires (I knew that too, have a reader) so they sold me a transmission computer flash/update due to the shifting wasn't as smooth as normal.  I think the shifting was related to ECO mode not transmission.  The Odyssey Forum claims VCM is the culprit.  I put a VCM muzler on it for now, which keeps the engine from going into ECO mode.  I am curious about your feedback of these Odyssey's VCM's?

Thank you

Rob