Code Definition

B1876 — Seatbelt Driver Pretensioner Circuit Failure

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

About B1876

B1876 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 B1876 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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.

B1876 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

B1876 is set by the Restraints Control Module (RCM) when it detects an electrical fault in the driver side seat belt pretensioner circuit during its routine self test of the supplemental restraint system. The RCM monitors the resistance of the pretensioner squib loop, looking for an open circuit or a value outside the expected low resistance range that would prevent reliable deployment in a collision. The pretensioner is a pyrotechnic device built into the driver seat belt retractor or buckle that fires during a crash to instantly remove slack from the belt, holding the occupant in the correct...

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