P2587
Turbocharger Boost Control Position Sensor B Circuit Range/Performance
Turbocharger boost control
Generic OBD-II
Medium
What it means
P2587 means the second turbocharger boost-control actuator position sensor ("B") is reading outside its expected range or not tracking the commanded position. That sensor reports where the wastegate or variable-geometry vanes actually sit, so when the ECM can't trust it, boost is usually limited — the car still drives, but with reduced power until it's repaired.
Medium
Can I keep driving? Yes, but with reduced power — the ECM often limits boost (limp mode) when it can't trust the actuator position, so expect sluggish acceleration until it's fixed.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power or limp mode
- Sluggish acceleration
- Possible over- or under-boost
Common causes
Most likely first
- Faulty 'B' turbo boost-control (VGT or wastegate) actuator position sensorLikely
- Sticking or carbon-bound actuator or vanesCommon
- Damaged wiring or connector at the position sensorCommon
- Poor or corroded electrical connectionLess often
- Boost or vacuum leak throwing off the position correlationLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and watch the 'B' actuator-position value on a scan tool.
- Inspect the position-sensor connector and wiring for damage or corrosion.
- Confirm the actuator moves freely and isn't bound by carbon/soot.
- Check for boost and vacuum leaks around the turbo plumbing.
- Replace the actuator or position sensor if it's out of range, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2587?+
You can drive, but the ECM usually limits boost, so power will be down. Fix it before towing or hard driving, as over-boost can also occur.
Can I just clear P2587?+
It returns once the ECM re-checks the actuator position unless the sensor, actuator, wiring, or a boost leak is addressed.
Related codes
Often seen with P2587
Read & clear P2587 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