Powertrain, generic · Hybrid propulsion

P0DD4 Hybrid/EV Battery Cell Balancing Circuit K

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0DD4 is the electrical fault code for balancing circuit K, the eleventh group, so it only exists on packs with at least eleven balancing channels. Public maker documents for this exact code were not found; Ford's summaries give K only to the stuck faults P0DD5 and P0DD6. How a monitoring chip catches broken wiring is shown in Infineon's TLE9012DQU data sheet: during its round-robin cycle the chip sinks a test current of about 15 mA into each balancing pin, odd channels in one cycle and even ones in the next, and flags a broken wire or missing load when the resulting change in cell voltage falls outside a set window. CARB 13 CCR 1968.2 requires such components to be monitored on hybrids. Related: P0DD5 to P0DD7.

Likely causes

Open wire or loose cell tap in group K
Corrosion or moisture at the connector of the monitoring board for K
Defective monitoring chip or external balancing part of channel K

Symptoms

  • Check engine light and hybrid system warning
  • Missing or implausible cell voltages for group K in the scan tool
  • Reduced charging or drive power

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€200–4,500
Time1–8 h

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

Parts involved

hv battery cell balancing circuit kbms

Related codes

P0DABP0DD5P0DD6P0DD7P0DD0P0DD8

References: law.cornell.edu, infineon.com.