Code Definition

B13D3 — Low Remote Transmitter Battery Voltage

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

About B13D3

B13D3 is a manufacturer-specific body diagnostic trouble code recorded for Mazda vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B13D3 is stored, the module has detected a signal or supply voltage lower than the expected operating range.

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.

B13D3 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

The Keyless Control Module (KCM) or Smart Control Module monitors voltage feedback and signal strength from the remote transmitter (key fob) each time it communicates with the vehicle. DTC B13D3 is logged when the module detects that the transmitter is operating with insufficient internal battery voltage, typically below the threshold needed for reliable two way communication. The remote transmitter contains a small coin cell battery (commonly CR2025 or CR2032) that powers the radio frequency transmitter and the rolling code microprocessor. When the code is set, the driver may notice reduced o...

Join TaT to view the complete code information and diagnostic details.

Quick Facts