B2124

What does B2124 mean?

B-code B2124 means "Door Passenger Reset Switch Stuck Failure". It is a generic OBD-II diagnostic trouble code (DTC) in the body electronics. The door passenger reset switch stuck failure is mechanically or electronically stuck and cannot move to the commanded position. This warning should be addressed within the next few days to avoid further damage. This code applies to OBD-II compliant electric and hybrid vehicles.

Possible Causes

• Mechanical obstruction preventing movement to the commanded position
• Actuator motor failure or binding due to wear
• Ice or debris accumulation blocking mechanical travel
• Faulty position feedback sensor incorrectly reporting stuck position

Recommended Actions

1. 1 Avoid aggressive driving and schedule a diagnostic appointment within the next 1–3 days
2. 2 Scan for all DTCs with an OBD-II scanner — note any related codes stored alongside B2124
3. 3 Inspect the mechanical component for physical obstruction, ice, or debris
4. 4 Manually operate (if safe) to check for binding or unusual resistance
5. 5 Clear the DTC, road-test the vehicle, and re-scan to confirm whether the fault returns
6. 6 If the fault persists after inspection and clearing, consult an EV-certified technician for component replacement

Related Body fault codes