The engine computer monitors a position sensor on the turbocharger's variable-geometry or wastegate actuator to confirm the mechanism is moving as commanded. Code P2565 indicates the signal voltage from that sensor is higher than the expected operating range, which usually points to an open circuit, a short to voltage, or an internally failed sensor.
The sensor itself has failed internally, producing an out-of-range high voltage signal. This is the most common cause of a circuit-high code for this component.
A break in the signal wire between the sensor and the PCM allows the voltage to float high, which the PCM interprets as a circuit-high condition.
The signal wire contacting a voltage source, such as the 5V reference or battery feed, raises the signal above its expected range.
Corrosion, bent pins, or poor terminal tension at the sensor connector can create an open-circuit condition that causes the signal to read high.
A stuck or severely binding actuator could push the sensor to an extreme position. This is less common for a circuit-high code and more typical of a range or performance code.
A damaged input driver inside the engine computer could misread the sensor voltage. This is extremely rare and should only be considered after all wiring and sensor testing is complete.
Short trips may be possible, but the vehicle will likely enter reduced power mode to protect the turbocharger. Extended driving without diagnosis is not recommended.
Almost never. The PCM is the least likely cause by a wide margin. Many drivers are told to replace the engine computer for this code, but the problem is nearly always the sensor, the wiring, or the connector. Replacing the PCM without thorough circuit testing is a misdiagnosis.
No. The boost control position sensor reports the mechanical position of the turbocharger's variable-geometry or wastegate actuator. A boost pressure sensor measures intake manifold pressure and would set a different code.
It is possible but less likely. A mechanically stuck actuator typically sets a range or performance code rather than a circuit-high code, which usually indicates an electrical fault in the sensor signal path.