DTC 88: Millimeter wave radar out of detection area
WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
Millimeter wave radar temperature is too high, millimeter wave radar supply voltage is too low, or out of detection condition.