Hi all We on a vacation to Utah NPs, pulling a 3000 lb camper. All was well until we hit the mountains around Denver. We left from Wisconsin. The light has been on now for 5 days. It goes off after the car sits overnight, but comes back on after the engine warms up. It seems to pull the camper fine especially on some steep gravel roads. Check engine light is on as well. Had codes PO171, PO174, PO420. All of these relate to O2 mountain air and a lean running condition. My question: is the VTM-4 light also caused by the lean running codes? We are currently in Escalante, UT and obviously no Honda dealer within 110 miles. Will I damage anything by continuing our travel in the mountains? I appreciate any comments on this issue. 2011 Pilot Touring Package