So, we left the key in the on position by mistake for about 2 hours on our 2011 MDX with 46,000 miles and original battery. Batt went dead. Jumped with another car per the MDX book. Took it for a ride to recharge. Noticed it was rpm-limited at 3,000 rpm's. Back at the ranch, turned it off, restarted fine but 4 warnings in info displayed showed up: Emissions, AWD, VSA and TSA. Plus, when restarted, after about a minute at normal idle, it automatically revved up to 2,000 rpm's--and stayed there. Any similar experience out there ? Thanks.