Powertrain, generic · Hybrid propulsion

P0DAC Hybrid/EV Battery Cell Balancing Circuit A

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0DAC reports an electrical fault in balancing circuit A, meaning the wiring, switch or monitoring chip behind it, not a balancing result. Audi uses it on the e-tron GT (2022-2026) in battery management address 008C and spells it out as an electrical fault of cell controller 1. Bulletin 2074056 explains that a short power interruption while the 12 V battery is reconnected can log this entry; the guided fault finding then proposes new HV modules, which Audi calls unnecessary and resets remotely. A later reporting case (2078729) pairs P0DAC00 with the red onboard supply lamp and a car that will not start. Audi already listed P0DAC00 for the 2016 A3 e-tron (bulletin 2046556), where new software cured it. Stuck states and implausible results are P0DAD to P0DAF.

Likely causes

Brief 12 V supply interruption, e.g. while reconnecting the 12 V battery (Audi e-tron GT)
Defective cell monitoring controller or balancing switch of circuit A
Loose or corroded sense/balancing lead connector at the module

Symptoms

  • Battery management warning or red onboard supply lamp
  • Vehicle may refuse to start or enter drive readiness
  • Diagnostic tester proposes replacing HV battery modules

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–5,000
Time0.5–8 h

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

Parts involved

hv battery cell balancing circuit abms

Related codes

P0DABP0DADP0DAEP0DAFP0DB0

References: law.cornell.edu, static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.