P2565 Code: Turbocharger Boost Control Position Sensor Circuit High

What the P2565 code means

On variable geometry turbos and on turbos with an electronic wastegate, a sensor reports the position of the mechanism. The computer compares it with the command to control boost pressure.

The sensor gets a 5 V reference and a ground from the computer and returns a signal between roughly 0.5 and 4.5 V. A high signal, the kind the P2565 code reports, usually comes from an open circuit or an interrupted ground.

It is usually built into the turbo actuator, where it is exposed to high temperatures.

To confirm it, measure the continuity of each wire between the component connector and the computer connector with the key off. It should be under 1 ohm, and an infinite reading means that wire is open. If the wiring is good, measure the component itself: an infinite resistance confirms it is open inside.

P2565 code symptoms

• Check engine light on.
• The computer does not control turbo pressure well and may limit power.

Likely causes of the P2565 code

1. Loose or broken connector. The most frequent cause.
2. Signal or ground wire cut, so the signal climbs up to the reference voltage.
3. Sensor open inside, with infinite resistance.
4. Short to 5 V or 12 V from rubbing against another wire in the harness.

How to diagnose the P2565 code step by step

1. Read the sensor value on the scan tool and compare it with what you expect.
2. Inspect the connector for corrosion, water or loose pins.
3. Check supply and ground with the key on: the reference should be correct and the ground voltage drop should be under 0.1 V.
4. Measure the signal with the connector plugged in and see whether it changes with the operating condition.
5. Do a wiggle test on the harness with the scan tool in graph mode.
6. Check continuity of each wire to the computer, which should be under 1 ohm.

How to fix the P2565 code

• Repair the connector or the wiring.
• Replace the sensor if the tests confirm it is bad.
• Correct the real condition if there is one.
• Clear the codes and verify with a road test.

Technical reference data

• 5 V reference; signal between 0.5 and 4.5 V depending on position.
• Approximate values only: check the manufacturer data for your vehicle.

Brand-specific notes

Start at the actuator connector. Heat makes the pins loosen and corrode, and a loose pin is the most common reason for a high signal. The P2565 code is cheap to chase if you begin there.

P2565 on Variable Geometry Diesels and Electric Wastegate Gas Engines

Common on diesels with a variable geometry turbo (Volkswagen, Ford, Hyundai and Kia, Chevrolet Duramax) and on gasoline engines with an electric wastegate.

Frequently asked questions about P2565