General Motors have announced a problem affecting the automatic occupant sensing (AOS) system in certain 2014-2015 Chevrolet Impala vehicles equipped with front vented-heated passenger seats. According to reports, the AOS calibration process may not effectively account for humidity and build material variation and could fail to suppress the front passenger air bag if a child seat is in the front passenger seat. If the airbag deploys with a child seat in the front passenger seat it could increase the risk of injury to the child. The front-passenger airbag status light will indicate that the airbag is “on” when the passenger seat is not occupied or is occupied by an infant. Additionally, the front-passenger seat’s safety-belt warning light and chime may turn on when the passenger seat is not occupied and the seatbelt is not buckled.

Dealers will correct the calibration-learning error by preconditioning the empty seat, and also resetting the ECU to a seat zero-value. Owners wanting more information about the problem are asked to contact Chevrolet customer service at 1-800-222-1020. GM’s number for this recall is 15400 and the NHTSA campaign number is 15V-465 .