12 volt replacement update. Dealership put in a new 12 volt finally on second visit. Found multiple codes had indeed been set: C1109, C118c, P0A8D, P3178, P0A8F, and C1A90--all described as low 12v. Also "Failed battery code: Bat TD4 LTH EWO 73J." Also, Tested 12v battery with GR8 testing...