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P0A1F

Battery Energy Control Module

A generic fault is reported by the battery energy control module of a hybrid or electric vehicle. The module manages charge balancing, temperature and contactor logic for the high-voltage battery.

  • Check engine light: Yes
  • Emissions related: Yes
  • Repair difficulty: shop_only

Common causes

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

  • BECM internal faultCommon
  • Communication with BECM lostPossible

Parts involved

  • Battery Energy Control Module
  • Hv Battery

P0A1F 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.