FixVault

DTC P0A1F-123 Battery Energy Control Module: Description

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

If the battery voltage sensor detects an internal malfunction, it sends an error signal to the hybrid vehicle control ECU. When the hybrid vehicle control ECU receives the error signal from the battery smart unit, the ECU warns the driver and performs fail-safe control.

DTC DETECTION CONDITION CHART

DTC No. DTC Detection Condition Trouble Area
P0A1F-123
  • The hybrid vehicle control ECU receives an error signal from the battery smart unit
  • Problem with the power source for the battery smart unit
  • Battery smart unit
  • Auxiliary battery
  • Wire harness or connector
  • IGCT3 fuse
  • IGCT2 NO 2 fuse