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Service bulletin 44851

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10057813
Published by NHTSA2015-06-30
Manufacturer's number44851
Manufacturer's date2015-01-09
NHTSA componentELECTRICAL SYSTEM:12V/24V/48V BATTERY

NHTSA's summary

FORD: CERTAIN 2015 C-MAX VEHICLES PRODUCED ON OR BEFORE OCT. 20, 2014 MAY EXPERIENCE 12-VOLT BATTERY DRAIN. *TA

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Electrical system, 12-volt battery

Vehicles listed
FORD C-MAX2015
FORD C-MAX ENERGI2015 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
tsb18-22162018-09-10. Service bulletin. Some 2012-2018 Focus Electric, 2013-2017 C-Max Energi, and 2013-2018 Fusion Energi plug-in hybrid electric vehicles (PHEV) may exhibit the high voltage (HV) battery failing to charge while connected to the second Generation 120-volt electric vehicle service equipment (EVSE) charge cord. Follow the Service Procedure steps to correct the condition.
SSM 462982017-03-15. Service bulletin. THE EV RANGE AFTER FULLY CHARGING A 2012-2016 FOCUS ELECTRIC, 2013-2016 C-MAX/FUSION ENERGI MAY VARY AFTER EACH CHARGING EVENT. THE WINDOW STICKER INDICATES 0-19 MILE RANGE FOR 2013-2016 CMAX/FUSION ENERGI. VARIATION OF EV RANGE MAY NOT INDICATE A BATTERY OR CHARGING CONCERN. EV RANGE IS SIMILAR TO THE DTE DISPLAY ON GASOLINE VEHICLES, EV RANGE WILL VARY WITH DRIVING/OPERATING CONDITIONS. CONDITIONS INCLUDE: EXTREME OUTSIDE TEMPERATURES, TERRAIN, DRIVING STYLE, CITY OR HIGHWAY DRIVING, TIRE PRESSURE, AND USE OF ACCESSORIES. IF THE CUSTOMER REPLACES THE LOW ROLL RESISTANCE TIRES WITH A MORE AGGRESSIVE TREAD THE RANGE WILL SUFFER. USING THE CABIN HEATER AND A/C, WHICH ARE ELECTRIC, WILL ALSO DECREASE EV RANGE. TO TEMPORARILY REMOVE THE IMPACT OF DRIVING/CLIMATE HISTORY, RESET THE LIFETIME SUMMARY OR DRIVING HISTORY BY USING THE SETTINGS MENU ON THE LEFT SIDE OF THE INSTRUMENT CLUSTER, UNDER DISPLAY
ASI-450982015-09-23. Service bulletin. FORD: THE BATTERY ENERGY CONTROL MODULE (BECM) NEEDS REPROGRAMMING TO LATEST CALIBRATION TO RESET DIAGNOSTIC TROUBLE CODE (DTC) P0B13 AFTER CONNECTING TO ELECTRIC CHARGING STATION. MODEL 2013-15 C-MAX PHEV, FUSION PHEV. *PE