Code Definition

B2930 (20) — Transmitting Data Line Open Circuit or Short to Ground

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

About B2930

B2930 is a generic (obd-ii standard) body diagnostic trouble code recorded for Ford vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B2930 is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit; and a short-circuit (voltage pulled to ground or to supply) in the monitored circuit.

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 B2930 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) and the connected gateway module monitor the transmitting (Tx) data line of the serial communication bus to confirm correct idle voltage, valid signal transitions, and clean release after each transmitted frame. DTC B2930:20 is set when the module detects that the transmitting line is sitting at an electrically invalid level, most commonly an open circuit (no pull up or pull down detected) or a short to ground that prevents the line from releasing to its idle state. When this code is logged the module cannot reliably transmit data to other modules on the network, ...

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