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B2124 Manufacturer-specific Basic entry

Door Passenger Reset Switch Stuck Failure

Updated 2026-10-02 · Body (manufacturer-specific)

Severity
Low
Typical repair cost
80 – 600 EUR
System
Body

This is a manufacturer-specific code. Its exact meaning can differ between makes; the definition below follows the most common usage.

What it means

B2124 is stored when the body control module commands the Door Passenger Reset Switch Stuck to move but the feedback shows it stays in one position. The cause is mechanical binding, carbon or dirt, or a failed actuator.

This entry is compiled automatically from the standard definition and typical diagnostic practice for this type of fault. A detailed, reviewed article is in preparation.

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Symptoms

  • The affected function (lighting, locking, windows, seats, climate or restraint) does not work or works intermittently
  • Warning light or message on the instrument cluster
  • Possible battery drain if a module stays awake

Common causes

  1. Carbon, varnish or dirt build-up blocking movement
  2. Worn or seized actuator mechanism
  3. Broken return spring or linkage
  4. Failed position feedback sensor giving a false reading
  5. Low supply voltage to the actuator motor

How to diagnose

  1. Command the Door Passenger Reset Switch Stuck with a scan tool and watch the feedback position
  2. Remove and inspect the component for carbon, dirt or mechanical damage
  3. Clean the mechanism and check it moves freely through its full range
  4. Measure supply voltage and resistance of the actuator motor
  5. Replace the actuator if it still does not follow commands

Frequently asked questions

Can I keep driving with B2124?

Yes. The fault does not affect safety or driveability, but it will keep the warning light on and may fail an inspection.

Will clearing B2124 fix it?

No. Clearing only erases the stored code; it returns as soon as the monitor runs again unless the cause is repaired.

Related codes

B2122B2123

Nearby codes in this group