Immobiliser Service: VOLVO IMMO SYNC CEM and SID803(A) – C326 Fault Code
This service rematches the Volvo SID803 / SID803A engine ECU and CEM when they have lost synchronisation. Loss of synchronisation can occur following a voltage drop or battery disconnection.
Fault symptoms
The existing listing identifies C326: Central Module Communication Signal Missing, and the dashboard message IMMOBILISER TRY AGAIN.
What to send
Send the engine ECU and CEM for this synchronisation service. Your ABS Information ID is also required. Obtain it using suitable diagnostic equipment and include it in the parcel or send us a clear photograph directly.
Include your order number, contact details, vehicle details and a brief description of the fault.
Before ordering
Check the full part number and module type against this listing. If you are unsure about compatibility or which option to select, contact us with your vehicle details, fault description and clear photographs of the module labels before ordering.
Turnaround
Our usual turnaround is 24–48 hours.
