Code Definition

P0250 — Turbocharger/Supercharger Wastegate Solenoid B High

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

About P0250

P0250 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 P0250 is stored, the module has detected a signal or supply voltage higher than the expected operating range.

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 P0250 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 wastegate solenoid, also referred to as the boost control solenoid, regulates the pressure signal applied to the wastegate actuator so the ECM can control boost rather than leaving it fixed by the actuator spring alone. It is a pulse width modulated valve that bleeds off or redirects part of the boost or vacuum signal, and the ECM switches it on the ground side while it is supplied with battery voltage. Solenoid B refers to the second boost control solenoid in the system, which on twin turbocharger applications is normally the second turbocharger and on single turbocharger applications may...

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