DTC B166A/72: Pressure Sensor Difference for Front Door [02/2017 - 09/2019]: Description

The door side airbag sensor LH and door side airbag sensor RH detect impacts to the vehicle through changes in pressure inside the front doors caused by deformation of the outer side of the front doors and send signals to the airbag sensor assembly.

Based on the signals sent by the door side airbag sensors, the airbag sensor assembly determines if the airbags and pretensioners should be deployed.

If the difference between the pressure detected by the door side airbag sensor LH and the pressure detected by the door side airbag sensor RH exceeds a certain value a certain number of times, the airbag sensor assembly will store DTC B166A/72.