B0071 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B0071 – Passenger Seat Belt Tension Sensor Circuit


B0071 Possible Symptoms


Air Bag Warning Light ON


B0071 Possible Causes


Faulty Passenger Seat Belt Tension Sensor,Passenger Seat Belt Tension Sensor harness is open or shorted,Passenger Seat Belt Tension Sensor circuit poor electrical connection,Faulty Sensing and Diagnostic Module (SDM)


B0071 Description


The inflatable restraint seat belt tension sensor is a 3-wire potentiometer mounted on the retractor or buckle side of the seat belt and provides an input to the Passenger Presence System (PPS). When an infant car seat is properly restrained on the front passenger seat, the seat belt is tightly secured through the car seat. The seat belt pulls on the tension sensor and changes the voltage signal to the PPS module. The PPS monitors the seat belt tension sensor circuit and if a fault is detected, DTC will be set. When the PPS detects this DTC within the PPS, it will notify the customer of the enable/disable status by turning ON the OFF indicator on the PASSENGER AIR BAG ON/OFF indicators. Then the PPS will communicate to the Sensing and Diagnostic Module (SDM) through a serial data communications that a PPS fault is present. The SDM will then suppress the deployment of the Instrument Panel (I/P) module and then turn the AIR BAG indicator ON.