Code Definition

B1022 — CAN communication error with electrically adjusted front left seat control module

System: Body  |  Type: Manufacturer-Specific  |  Make: Mercedes-Benz

About B1022

B1022 is a manufacturer-specific body diagnostic trouble code recorded for Mercedes-Benz vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B1022 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

Mercedes-Benz vehicles with electrically adjustable seats use a dedicated seat control module on each front seat that communicates with the rest of the vehicle over one of the interior CAN buses, typically CAN B (interior) via the front SAM and central gateway. The module handles motor drivers for the seat adjustment axes, position sensors, memory recall, and in many cases heating, ventilation, and occupant detection functions. B1022 is logged when the monitoring module (commonly the front SAM or gateway) fails to see expected periodic messages from the front left seat control module within th...

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