UDS response 0x13 indicates that the request length or format was not accepted. That points towards how the operation was requested.

How to narrow it down

Retain the tool-generated log and confirm the selected vehicle, controller and software version. If the problem began after a tool update, record that sequence. Avoid translating the message into a claim that the ECU’s stored program is corrupt without separate evidence.

What to include with the fault report

Supply the complete error screen and the operation that immediately preceded it.

This is not a normal P-code. Use the supported diagnostic software route rather than editing messages or files by trial and error.

Speak to AXION

For CAN-bus and vehicle-network diagnostics, send your vehicle details and fault report. Workshop assessment is in Didcot, Oxfordshire. Suitable postal or remote work is confirmed before booking.

Technical background from py-uds. The referenced design explains the principle; the vehicle-specific procedure determines the repair.

Related reading — UDS 0x22 conditions not correct before an adaptation. Browse all vehicle-electronics diagnostic notes or return to the repair library.