Powertrain, generic · Hybrid propulsion

P0DCC Hybrid/EV Battery Cell Balancing Circuit I

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0DCC concerns the hardware of balancing circuit I, the ninth group, so only packs split into at least nine balancing channels can raise it. No maker publishes this exact code: Ford's hybrid summaries assign letter I only to the stuck codes P0DCD and P0DCE, and Audi's A3 e-tron bulletin stops at H. How an electrical fault of such a channel can be caught is shown in Renesas patent US9735567B2: a pull-up resistor lifts the balancing terminal to cell potential when the switch fails to close, so commanding it on and still seeing the full cell voltage exposes an open path. Broken leads, corroded connectors or a faulty monitoring chip are the usual suspects. California's regulation demands monitoring of such parts on hybrids. Related: P0DCD to P0DCF.

Likely causes

Broken balancing or sense lead of group I
Corroded connector between cell group I and its monitoring board
Defective monitoring chip for channel I

Symptoms

  • Hybrid battery warning with check engine light
  • Electric drive or charging limited by the battery controller

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 ibms

Related codes

P0DABP0DCDP0DCEP0DCFP0DC8P0DD0

References: law.cornell.edu, patents.google.com, fordservicecontent.com.