Code Definition

B1881 — Seatbelt Passenger Pretensioner Circuit Open

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

About B1881

B1881 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 B1881 is stored, the module has detected an open (broken or disconnected) electrical path 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.

B1881 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

B1881 is set by the Restraints Control Module (RCM) when it detects a confirmed open circuit in the passenger side seat belt pretensioner squib loop during its continuous SRS self test. This is the passenger side counterpart to B1877, and specifically indicates broken continuity in the wiring or the pretensioner squib element itself, rather than a resistance simply at the edge of tolerance. The pretensioner is a pyrotechnic device built into the passenger seat belt retractor or buckle that fires during a collision to remove slack from the belt and hold the occupant in position for proper airba...

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