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TuningBot DTC Database · v4.37.14

P2378 Turbocharger/Supercharger Inlet Pressure Sensor B Circuit Intermittent/Erratic

Generic (OBD-II) interpretation in the TuningBot DTC database.

P · PowertrainEngineOBD2

What P2378 means

P2378
Turbocharger/Supercharger Inlet Pressure Sensor B Circuit Intermittent/Erratic Generic · engine Data confidence 65%

The control module detected an unstable or intermittent signal in the Turbocharger/Supercharger Inlet Pressure Sensor B circuit.

Symptoms

  • Possible reduced power or limp mode
  • MIL illuminated
  • Possible abnormal turbocharger noise

Possible causes

  • Turbocharger actuator or position sensor fault
  • Sticking variable geometry mechanism
  • Charge-air or vacuum leak
  • Wiring or connector fault

Recommended checks

  • Compare specified vs actual boost with live data
  • Check actuator movement over the full range
  • Check hoses and vacuum lines
  • Inspect wiring and connectors

Related and nearby codes

P23 range
P2300P2301P2302P2303P2304P2305P2306P2307P2308P2309P230AP230BP230CP230DP230EP230FP2310P2311

How to read P2378

P

Powertrain: engine, transmission and driveline systems.

2

Generic SAE-standard code: same meaning on every make.

378

Specific fault index within the subsystem.

Frequently asked questions about P2378

What does P2378 mean?

Turbocharger/Supercharger Inlet Pressure Sensor B Circuit Intermittent/Erratic. The control module detected an unstable or intermittent signal in the Turbocharger/Supercharger Inlet Pressure Sensor B circuit.

Is P2378 generic or manufacturer-specific?

P2378 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P2378 at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry and, where the ECU needs it, corrects the checksum too. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.

Other file services

Stage 1/2/3 TuningDPF RemovalEGR RemovalAdBlue / SCR RemovalDTC RemovalIMMO OFFSpeed Limiter (Vmax)

Understand the system behind this code: Diagnostic Strategy and DTC Logic

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