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P2C43

Battery Isolation/Voltage Stabilization Control Circuit

The battery isolation/voltage stabilization module reports a control circuit condition. Power supply quality during start/stop or load shedding is impaired.

  • Check engine light: Yes
  • Emissions related: No
  • Repair difficulty: medium

Common causes

Ordered by how often each turns out to be the cause.

  • Isolation/stabilization module failedCommon
  • Wiring or connector faultPossible

Parts involved

  • Battery Isolation Module
  • Wiring Harness
  • ECM

P2C43 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.