B1881 FORD, LINCOLN, MAZDA, MERCURY: PASSENGER SEAT BELT PRETENSIONER CIRCUIT OPEN
POST UPDATED IN February, 2023
B1881 FORD, LINCOLN, MAZDA, MERCURY: PASSENGER SEAT BELT PRETENSIONER CIRCUIT OPEN
As part of the vehicle safety systems, manufacturers incorporate seat belts into their vehicles. The function of the seat belt is to reduce the likelihood of the occupants of the vehicle being thrown out of the windows or windshield after a collision. The belts used in vehicles are usually two- or three-point belts, which are combined in a system that, when an impact is detected, the belt holds the occupants tightly.
Belt pretensioners are a device that is used in cases where a frontal crash occurs so that the belt does not lengthen and can be adjusted to the body to keep it supported against the seat and backrest. The RCM (Restraint Control Module) is responsible for checking that all seat belt pretensioners are working properly.
DTC B1881 OBDII code is stored on Ford, Lincoln, Mazda, and Mercury vehicles when the RCM detects a low or open resistance in the passenger seat belt pretensioner circuit.
B1881 OBD2 diagnostic code is set by the following:
To troubleshoot the B1881 OBDII fault code you must do the following: