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Home >> Toyota >> 2004 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 518 (Hybrid Battery System (Diagnostics)) >> DTC P0A1F: Battery Energy Control Module >> Monitor Description
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Monitor Description

WARNING: This page is about a different car, the 2004 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

If the battery ECU detects an internal malfunction in the ECU itself, it illuminates the MIL and sets a DTC.