Powertrain, generic · Hybrid propulsion

P0DC2 Hybrid/EV Battery Cell Balancing Circuit F Stuck Off

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modeNo

With P0DC2 the controller concludes that circuit F does not bleed when asked to, so the fullest cells of group F are never trimmed. Ford's 2014 hybrid OBD summary applies the same 75 mV deviation test over the six cells of each circuit as for the stuck-on code, but the 2014 to 2018 versions want the deviation seen at two power-ups in a row, before the contactors close. The practical cost lies in charging: the group that cannot shed charge reaches its upper limit first and stops the charge for the whole pack. An Intersil (now Renesas) application note estimates that lithium cells 150 mV apart at full charge can lose up to a quarter of usable pack capacity. CARB's section 1968.2 counts the missing response as a malfunction. The always-on opposite is P0DC1.

Likely causes

Bleed resistor of group F burnt open

Bleed transistor of circuit F no longer conducting

Loose cell tap or connector pin on the balancing lead

Symptoms

Charging ends earlier than usual, displayed full charge gives less range
Cells of group F remain highest after charging
Check engine light, usually without noticeable driving change

Repair estimate

DifficultyShop_onlyWorkshop job

Parts and labour€300–4,500

Time1.5–8 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

hv battery cell balancing circuit fbms

Related codes

P0DAB P0DC0 P0DC1 P0DC3 P0DBE P0DE7

References: law.cornell.edu, fordservicecontent.com, renesas.com.