P0250
Turbocharger/Supercharger Wastegate Actuator B High
Turbo/boost control
Generic OBD-II
High
What it means
P0250 means the ECM detected a high-voltage (short-to-power) fault in the 'B' wastegate solenoid control circuit. This solenoid helps regulate turbo or supercharger boost; when its circuit fails the ECM typically limits power or enters limp mode to protect the engine, so the symptom is reduced performance rather than a no-start.
High
Can I keep driving? Drivable but limited — expect reduced power or limp mode and uncontrolled boost, so drive gently until the wastegate 'B' circuit is repaired.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power or limp mode
- Sluggish or laggy acceleration
- Over- or under-boost, sometimes with poor fuel economy
Common causes
Most likely first
- Short-to-voltage or high-voltage fault in the wastegate solenoid 'B' control circuitLikely
- Failed wastegate control solenoid 'B'Common
- Corroded or damaged connector at the solenoidCommon
- Chafed wiring contacting a power sourceLess often
- Faulty ECM driver (least likely)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and inspect the wastegate solenoid 'B' connector and wiring for a short to voltage.
- Measure the solenoid resistance and check the control circuit against spec.
- Repair any wiring shorted to power; replace the solenoid if it's out of spec.
- Confirm the wastegate actuator moves freely and isn't binding.
- Clear the code and road-test through a boost cycle to verify the fix.
FAQ
Quick answers
Is it safe to drive with P0250?+
Short, gentle trips are usually okay, but boost control on that turbo is compromised and the engine may enter limp mode. Repair it before driving hard.
Can I just clear P0250?+
No lasting effect — it resets once the ECM commands the wastegate and sees the circuit fault. Fix the wiring or solenoid first.
Related codes
Often seen with P0250
Read & clear P0250 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