The Powertrain Control Module receives electronic signals from two sensors, the Turbocharger Control Position Sensor (TBCPS) and the Boost Pressure Sensor (BPS). Through the Turbocharger Control Position Sensor (TBCPS), the PCM controls the amount of fuel required for ignition and the pulses sent to the engine via the turbo. On the other hand, the Boost Pressure Sensor (BPS) provides the rest of the data required for boost pressure calculations.
If the turbocharger electrical circuit becomes problematic with voltages above 4.8V according to the manufacturer’s preset ranges, the Powertrain Control Module interprets this as a fault and will store the diagnostic code P2565 OBD2.