It is one thing to go 4 or 5 years and have to buy a new battery -- that's pretty much a way of life with any car on the road. However, with the C-Max it has been the noticeable number of cars with multiple battery failures in the first year and Ford's seeming inability to diagnose, much less fix, the problem with certainty. I have a 2013 Ford C-Max Hybrid bought new. It now has 33,000 miles. We can drive it for numerous weeks with no problem, then after being parked in our garage overnight it will not start. This has occ … read more 58. Ford Model: CMax 1.6 TDCi LX. Posted September 7, 2010. On 9/5/2010 at 11:39 PM, andyjw said: With engine running around 13.8 - 13.9 Volts. With the heavy load units on (H/Lights, rear screen etc) & engine at around 2000 you ought to have around 14½ V across the battery. Better take it to Ford. I scheduled time with my closest Ford Dealer in Longmont Colorado. They spent 5 hours trying to diagnose what the problem could be. They came up with two potential problems: Battery Controller - $1,100 - $550 in parts, $550 in labor OR PHEV Battery - $13,500 they think. First off, a little background information: I have a 2013 Ford C-max SE and have had three dead battery events. They have always occurred when the car sat overnight. We make a point of making sure that nothing is left on or plugged in. We even make sure the keys are taken out of the ignition switch. My Ford C-Max (2005) 2.0 TDCI has started losing power once or twice a day. All seems fine then when I idle at a junction and try to start off the engine won''t revv and there''s no power. Engine stil … The 2016 Ford C-Max Energi has 1 problems reported for c-max battery live compromised in cold. The mileage of a fully charged battery of the 2016 Ford C-MAX Energi is rated by Ford at 19 miles Consider to support my channel and all the hard work put into it at http://www.patreon.com/LMAutoRepairsThank youHiThis Ford came to me with an intermittent OHCBMy.