P2376 indicates that the engine control module has detected a voltage signal from the turbocharger/supercharger inlet pressure sensor B that is below the expected range. This sensor provides the ECM with intake manifold pressure data used for boost control and fuel management.
The sensor element itself can degrade or become electrically open, producing a low voltage output.
Damaged, corroded, or loose wiring and connectors in the sensor circuit can create a low‑voltage condition.
A shorted signal wire to chassis ground pulls the sensor voltage below the minimum threshold.
An air leak upstream of the sensor can cause the measured pressure to be lower than expected, triggering the code.
A rare internal ECM fault may misinterpret a normal sensor signal as low; this is only considered after all other causes are excluded.
No. ECM replacement is rarely required; the code is almost always caused by the sensor, its wiring, or an intake leak.
Cleaning may temporarily improve a contaminated sensor, but a sensor that consistently reads low voltage usually requires replacement.
The vehicle will typically enter a reduced‑power mode to protect the engine; continued operation is possible but performance and fuel economy will be degraded.