Code Definition

B1023 — CAN communication error with electrically adjusted front right seat control module

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

About B1023

B1023 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.

B1023 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

This fault code sets when a Mercedes-Benz body CAN controller detects that communication with the front right electrically adjusted seat control module has been lost or intermittently disrupted. The seat module is a node on the interior CAN bus, exchanging data with the SAM, central gateway, instrument cluster, and memory function control unit to coordinate seat position, heating, memory recall, and comfort functions. The fault is logged when expected cyclical messages from the seat module are missing for a defined time window, or when the messages arrive with checksum or counter errors. When ...

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