The battery goes dead a few days after taking delivery of new vehicle; this happens almost like clockwork every six months - resulting in many visits and 4 new batteries from 6/2013 until 1/2016. No dead battery now for 11 months. Ford always indicated we did something to cause these conditions. Look in this video I show you how to properly jump start your Ford C Max hybrid and where the ground and the positive connections are under the hood. 2016 ford cmax energi, dead battery, replaced battery, won't shift out of park and says the energi cable is connected, - Answered by a verified Ford Mechanic 2016 C Max Energi, about 38000 miles. Zero problems until this incident. Went out to start car, everything was dead. Called service, they jumped 12v battery. When car started, yellow wrench illuminate … read more The 2015 Ford C-Max Energi has 3 problems reported for dead battery. Average repair cost is $100 at 20,000 miles. 1 day ago · Idling for long periods of time and extreme temperatures can also shorten battery life. Have your battery tested at your Ford Dealer if you see or experience the following: Corrosion around the terminals or posts. Damage on the terminals or posts. Frays or cuts in the battery cables. Loose battery cables or terminals. If your vehicle has keyless ignition and the battery dies in your key fob, you will need an alternative way to get inside and start your vehicle. First, fin All Activity; Home ; Ford C-MAX Hybrid Mod & Tech Discussion ; Maintenance, TSB's & Recalls ; Battery dead IIRC, the C-Max battery is around 30 Ah which at C/100 would be a discharge current of 300 mA. If your 12 V battery is 6 months old and your key on voltage isn't at least 14.7 V, the charging algorithm likely believes that your battery is a lot older than 6 months and will use the old data when determing the bulk charge state. The most common cause of key fob not locking or unlocking the doors in Ford C-Max is dead coin battery inside the key fob. But the remote control can also stop working due to worn buttons, poor battery contact, water damage, receiver module issues, signal interference, dead 12 volt battery, unpaired key requiring reprogramming, or defective XvEH.