Some 2013-2017 C-MAX Energi, 2013-2018 Fusion Energi, 2013-2018 C-MAX/Fusion Hybrid/MKZ Hybrid may exhibit a no start with battery energy control module (BECM) diagnostic trouble code (DTC) P0AE5. For 2015-2017 C-MAX Energi refer to the 2014 MY C-MAX Workshop Manual (WSM), Section 414-03A for normal diagnostics. For all vehicles, if WSM pinpoint testing for BECM DTC P0AE5 finds the DC/DC converter control module (14B227), cabin coolant heater (18K463) or A/C compressor (19703) has low high voltage circuit internal resistance, only replace the component found with low internal resistance. It is not necessary to replace the high voltage battery junction (10C666) along with the low resistance high voltage component. The WSM is currently under revision.
