P2588
Turbocharger Boost Control Position Sensor B Circuit Low
Turbocharger boost control
Generic OBD-II
Medium
What it means
P2588 means the "B" boost control position sensor — 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.
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 'B' 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 P2588?+
You can drive gently, but the ECM will likely limit boost, cutting power. Repair it soon to restore normal performance.
Can I just clear P2588?+
It will return until the low-circuit fault or sensor is repaired.
Related codes
Often seen with P2588
Read & clear P2588 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX