P2375 indicates that the vehicle's control module has detected that the voltage or signal from the turbocharger inlet pressure sensor B is outside the expected range or does not respond appropriately to performance demands.
The sensor can degrade or short internally, sending incorrect pressure readings to the ECM.
Open circuits, shorts, or high resistance in the harness can cause the signal to fall outside normal limits.
A leak in the intake tract or a failing turbocharger can prevent the sensor from seeing proper pressure.
A fault in the control module's input circuit can misinterpret the sensor signal, but this is uncommon.
In most cases the PCM does not need replacement; the issue is usually a faulty sensor, wiring, or low boost pressure.
The vehicle may enter limp mode, so it is best to address the problem before extended driving.
Sensor cost varies by vehicle, but it is generally less expensive than a PCM replacement.