Flash: Battery Pack Control Module
(BPCM) Diagnostic and System Updates
Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation
the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set:
? P0AA4-00 - Hybrid Battery Negative Contactor Circuit Stuck Closed.
? P0AA1-00 - Hybrid/EV Battery Positive Contactor ?A? Stuck Closed.
Customers may also experience the following:
? The vehicle will not start.
This bulletin involves updating the BPCM with the latest available software.
