P2586
Turbocharger Boost Control Position Sensor B Circuit
Turbocharger / boost control
Generic OBD-II
Medium
What it means
P2586 means the ECM has detected an electrical fault in the circuit for turbocharger boost-control position sensor "B," a second sensor reporting the position of the wastegate or variable-vane mechanism. Without a trusted position signal, the ECM usually limits boost, so the car may feel down on power or drop into limp mode. Common causes are the sensor itself, its wiring, or a binding actuator.
Medium
Can I keep driving? Usually yes, but expect reduced power or a limp mode — the ECM often limits boost when it can't trust the position sensor.
Common symptoms
What you'll notice
- Check-engine light on
- Noticeable loss of power or sluggish acceleration
- Reduced or erratic turbo boost
- Possible limp/failsafe mode
Common causes
Most likely first
- Faulty turbocharger boost-control position sensor (sensor 'B')Likely
- Open, shorted, or high-resistance wiring in the sensor circuitCommon
- Corroded or loose sensor connectorCommon
- Binding or stuck boost-control actuator/vane mechanism affecting the sensorLess often
- Faulty ECM/PCM input (least likely)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and note the reported boost-control position.
- Inspect the position sensor connector and wiring for damage, corrosion, or looseness.
- Check the signal, reference, and ground circuits for opens or shorts.
- Verify the boost-control actuator/vanes move freely and aren't binding.
- Replace the sensor or repair the wiring as needed, clear the code, and road-test for normal boost.
FAQ
Quick answers
Is it safe to drive with P2586?+
Short-term yes, but the car may be down on power or in limp mode. Avoid hard acceleration and get the boost-control system checked.
Can I just clear P2586?+
You can, but a bad sensor or wiring fault returns and boost stays limited. Diagnose the sensor and actuator first.
Related codes
Often seen with P2586
Read & clear P2586 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