Circuit/System Description
WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.
| Component | Description |
|---|---|
| B65 Manifold Absolute Pressure and Intake Air Temperature Sensor | The intake air temperature sensor 3 and the intake manifold pressure sensor are integrated in the same housing, which is located behind the throttle body. |
| B75 Mass Airflow Sensor | The assembly has several functions:
|
| B105 Supercharger Air Inlet Pressure Sensor | The sensor is a capacitive pressure transducer. Electronics in the sensor convert pressure into an analog voltage signal. |
| K20 Engine Control Module | The control module contains a microprocessor used to process input data to control outputs. The control module controls a series of actuators to ensure optimal engine performance. The control module does this by reading values from a variety of sensors, interprets the data and adjusts the engine actuators accordingly. |
| Q38 Throttle Body | The component Q38 contains a contactless inductive position sensor. A fixed transmitter coil excites a movable rotor, which in turn induces a current in a fixed receiver coil. The current varies with the angle of the rotor. Electronics inside the sensor convert the current into digital data which is transmitted via a serial data circuit to the control module K20. |
The ECM compares the measured mass air flow with the calculated air flow based on throttle position and the calculated air flow based on manifold absolute pressure.
This DTC sets when the control module detects an inconsistency between the pressure sensors and cannot identify which sensor failed.