Ford P0AA4 OBD-II Trouble Code Definition: P0AA4 Hybrid Battery Neg P0AA4 Ford OBD-II Trouble CodeDescription: Trouble Code: System: Subsystem: P0AA4 – (ASE) Powertrain — DTC Description: Hybrid Battery Negative Contactor Circuit Stuck Closed Location: Analysis: Likely Cause: Stuck Closed Notes: […]