NHTSA Complaint #11501176 — 2015 CHEVROLET VOLT

The passenger presence sensor in the front passenger seat is malfunctioning and spare parts to replace it are not available from the manufacturer. The Chevrolet dealership has inspected and verified this issue, and the system is available for inspection upon request. This is the same issue that NHTSA investigated in the 2013 model described below. This sensor failure results in a check airbag signal and prevents the deployment of the passenger frontal and knee air bags, posing risk of serious injury to passengers. The PSS may develop a malfunction due to bunching of the sensor mat in the seat trench. The bunching of the sensor mat could cause the mat to repeatedly fold in the same location. Over time, the repeated folding can cause an increased resistance in the sensor mat. An increased resistance in the PSS sensor mat is detected as a fault in the air bag system diagnostic. If this fault is detected, a diagnostic trouble code will be stored in the air bag control unit and the air bag MIL will illuminate. Further, if the fault is detected, the passenger frontal and knee air bags will be suppressed in a crash of sufficient severity to warrant a commanded deployment regardless of the nature of size of the occupant of the front passenger seat.