Fault code B2477 – a step-by-step guide to diagnosing and fixing it

Error code B2477 is displayed and the check engine light is on - what does this mean?

DTC B2477 is recognized by the OBD/EOBD system and indicates a problem with the driver's seat memory module or seat adjustment. This fault code typically refers to a malfunction in the driver's seat electrical memory system and can have slightly different meanings for different manufacturers.

What causes can this error code have?

• Defective seat adjustment module
• Damaged wiring to the memory module
• Corroded or loose plug connections
• Blown fuse in the seat circuit
• Defective memory switch on the seat
• Faulty position sensors in the seat frame
• Weak or defective vehicle battery
• Software error in the body control unit

What symptoms occur in parallel with fault code B2477?

• Memory function defective: The programmed seat positions can no longer be recalled
• Seat adjustment does not work: Electric seat adjustment does not respond to inputs
• Warning lights: Indicator lights in the dashboard light up
• Intermittent problems: Seat functions work unreliably or fail sporadically
• Complete failure: All electric seat functions are out of order

How to fix the problem of error code B2477?

• The repair requires a systematic diagnosis of the electrical seat components.
• Checking and replacing the fuses in the seat circuit and checking the power supply
• Inspection and repair of the wiring between the seat module and control unit, including cleaning of corroded contacts
• Replacement of the defective seat adjustment module according to the manufacturer's specifications
• Reprogramming or resetting the memory system via diagnostic device
• Calibration of the position sensors and carrying out a basic adjustment of the seat system
• Battery test and, if necessary, replacement if the voltage is insufficient