Code Definition

B2425 — Remote Keyless Entry Out of Synchronisation

System: Body  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About B2425

B2425 is a generic (obd-ii standard) body diagnostic trouble code. 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.

Because B2425 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The Body Control Module (BCM) or Remote Keyless Entry (RKE) Receiver Module maintains a rolling code synchronisation counter that is incremented each time a recognised remote key fob transmits to the vehicle. DTC B2425 is set when the BCM receives a valid transmission from a known fob but the rolling code value falls outside the resynchronisation window, indicating that the fob and the vehicle are no longer in step. This typically happens after a fob has been pressed many times away from the vehicle, a depleted fob battery, intermittent receiver reception, or interference from other RF sources...

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