Code Definition

P2564 — Turbocharger Boost Control Position Sensor 'A' Circuit Low

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

About P2564

P2564 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 P2564 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 P2564 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 turbocharger boost control position sensor A reports the position of the boost control actuator, which moves the wastegate or the variable geometry turbine vanes so the engine control module can regulate boost pressure. DTC P2564 sets when the ECM detects the signal voltage from this position sensor is lower than the expected range, indicating a short to ground, an open, or a failed sensor. Without a valid position signal the ECM cannot confirm actuator movement, so it may limit boost and log related boost or performance codes. When the code is set the driver may notice reduced power, a la...

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