A hexadecimal value in a communication log may identify an operation such as reading data. It should not automatically be searched as if it were a stored vehicle DTC.

Interpreting the evidence

Keep the message structure and the tool’s interpretation together. Identify whether the value belongs to a request, response, parameter or fault record. This avoids attaching an unrelated repair explanation to a number that simply describes the diagnostic operation.

Keep this evidence

Send the full line from the log with surrounding context.

A bare number is insufficient for a fault explanation. Include the controller and the task underway.

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 CSS Electronics. The referenced design explains the principle; the vehicle-specific procedure determines the repair.

Related reading — A positive UDS response confirms one requested operation. Browse all vehicle-electronics diagnostic notes or return to the repair library.