Code Definition

P0241 — Turbocharger Boost Sensor B Circuit Low

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0241

P0241 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0241 is stored, the module has detected a signal or supply voltage lower than the expected operating range; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0241 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0241 fault code is set when the Engine Control Module (ECM) detects a lower than expected input signal from the Turbocharger Boost Sensor B. This sensor is often a secondary sensor in the turbocharger system or located in a different area or on a different turbocharger in twin-turbo systems. It measures the pressure or boost generated by the turbocharger and sends this information to the ECM. A low input signal in this circuit might suggest an electrical problem, such as a short to ground, a faulty sensor, or issues with the wiring or connectors. This condition can lead to inaccurate boos...

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