Circuit/System Description
WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
This system consists of the following components:
- B75C Multifunction Intake Air Sensor
- B74 Manifold Absolute Pressure Sensor
This DTC sets when the control module detects an inconsistency between the pressure sensors and cannot identify which sensor failed.