Code Definition

P0048 — Turbo/Super Charger Boost Control Solenoid Circuit High

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

About P0048

P0048 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 P0048 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 P0048 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 P0048 code indicates a high voltage condition in the turbocharger or supercharger boost control solenoid circuit. This solenoid plays a crucial role in the engine's forced induction system, controlling the amount of boost pressure generated by the turbocharger or supercharger. A high voltage in the solenoid circuit can lead to improper control of the boost pressure, potentially affecting the engine's performance, fuel efficiency, and emissions.

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