MG ZS EV: reading fault codes without a dealer tool

The battery management module (BMS) on the MG ZS EV answers standard OBD-II requests, but most popular scanners only read the drivetrain layer and don't reach deeper into the high-voltage CAN bus. A full read needs an adapter that supports the extended MG/SAIC protocol.

The most common P0A-range codes flag cell-module imbalance and a single-cell temperature threshold — in practice they usually point to one weaker module rather than a whole-pack failure.

Before opening the high-voltage housing, always follow the service manual's capacitor discharge wait time and use gloves rated for live work.