P2564

Turbocharger Boost Control Position Sensor A Circuit Low

Turbocharger boost control Generic OBD-II Medium

What it means

P2564 means the boost control position sensor "A" — which reports the position of the turbocharger's boost/wastegate control actuator — is reading low, from a short-to-ground or open. Losing accurate feedback on the boost actuator, the ECM typically limits boost and puts the engine into reduced-power mode, so it's worth repairing soon.

Medium

Can I keep driving? Drivable gently, but expect reduced power or limp mode as the ECM limits boost — have it repaired soon.

Real-world scan data

Seen in

1,012

scans in the past year

Found in

0.2%

of scans

0.3%

of scans that found faults

Appears alongside · share of P2564 scans

P0193in 25.1% of scans

P02E8in 23.3% of scans

P0113in 19.1% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Loss of power or limp mode
Poor acceleration
Check-engine light on
Turbo lag, underboost, or overboost

Common causes

Most likely first

Short-to-ground or open in the boost control position sensor wiringLikely
Corroded or loose connector at the sensorCommon
Faulty boost control position sensorCommon
Sticking or failed boost/wastegate actuatorLess often
Rarely, an ECM faultLess often

How to diagnose & fix

Work through it in order

Scan for codes and record freeze-frame data.
Inspect the sensor connector and wiring for a short-to-ground or open.
Check the sensor signal voltage against specification.
Inspect the actuator linkage for binding or sticking.
Test actual boost with a gauge, replace the sensor if faulty, then clear and re-test.

FAQ

Quick answers

Is it safe to drive with P2564?+

You can drive gently, but the ECM will likely limit boost, cutting power. Repair it soon to restore normal performance.

Can I just clear P2564?+

It will return until the low-circuit fault or sensor is repaired.

Read & clear P2564 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX