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0x22 is the function to "request data by identifier", the subfunction is the id e.g. 22B101 = function 0x22 with subfunction 0xB101 This is a standard UDS query, you can find some examples here: Unified Diagnostic Services

What i actually have is both, I have an OVMS unit connected on the OBD port and an IntrepidCS data logger permenantly connected on the GWM logging all the CAN buses. See here fror the breakout lead connections: Gateway Module Breakout Lead You need to use a CAN device at 500 kbps (or more) on...

The Gateway Module routes all the data across the 4 different CAN buses on the car, therefore it is one of the best places to acess all the internal data. You can get onto it using a breakout lead which does not involve any damage to the actual car wiring. However this is not easy to do and if...

For anyone looking to reverse engineer the ZS EV, here is the latest knowledge we have on both CAN and OBD: OBD is for diagnostic queries where you request data from the OBD port and the ECU will respond with the data: MG ZS EV OBD Reverse Engineering CAN is for internal data, which is...