Code Definition

B124D — Tyre Pressure Sensor General Signal Failure

System: Body  |  Type: Manufacturer-Specific  |  Make: Ford

About B124D

B124D is a manufacturer-specific 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 B124D is stored, the module has detected a sensor-related fault — the reported value from the named sensor is out of spec.

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.

B124D is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

This code is stored by the Body Control Module on Ford vehicles where the tyre pressure monitoring function lives inside the BCM rather than in a separate TPMS module. Each wheel carries a battery powered sensor that transmits pressure, temperature and its own unique identifier by radio to a receiver, and the BCM compares those transmissions against the identifiers it has learned for the vehicle. B124D is set in continuous memory when one, two or three of the sensors stop responding or send data the module cannot use, which is why it is described as a general signal failure rather than a fault...

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