P2564 — Turbocharger Boost Control Position Sensor Circuit Low
Moderate severityWhat it means
P2564 is stored when the engine control unit sees a fault involving the turbocharger boost control position sensor circuit. This sensor reports the position of the boost-control actuator (wastegate or vanes) so the control unit can manage boost accurately; a fault makes boost control unreliable. A “low” reading means the signal is stuck near the bottom of its range, which usually points to a short to ground or an internally failed sensor.
Common symptoms
- The live reading sits abnormally low or at zero
- Loss of power or limp mode
- Boost that is too high or too low
- Check engine light
Likely causes
- Signal wire shorted to ground
- Internally failed sensor pulling the signal low
- A faulty boost-control position sensor or actuator
- A wiring/connector fault or a sticking mechanism
What to check first
- Compare the live signal against a known-good range and check for a short to ground
- Compare commanded vs actual actuator position in live data
- Inspect the sensor/actuator linkage and connector
Can you keep driving?
Often drivable with reduced power, but uncontrolled boost can stress the turbo — diagnose soon.
Frequently asked questions
What is the most common cause of P2564?
The most likely cause is: Signal wire shorted to ground. Several other faults can set P2564 as well, so confirm the real cause with live data and the checks above before replacing any parts.
Can I just clear P2564 and keep driving?
Clearing P2564 with an OBD2 scanner turns the warning light off, but if the underlying fault has not been repaired the code will usually come back within a few drive cycles. Fix the cause first, then clear the code to confirm the repair worked.
How serious is P2564?
P2564 is a moderate-severity code. The car is often still drivable, but have it diagnosed soon — the underlying problem can get worse and it may fail an emissions test.
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