P0248
Turbocharger/Supercharger Wastegate Actuator B Range/Performance
Turbo/boost control
Generic OBD-II
High
What it means
P0248 means the "B" wastegate actuator — which regulates how much boost the turbo or supercharger makes — isn't responding the way the ECM commands. The result is poor boost control: reduced power, flat acceleration, and sometimes limp mode. Common causes are a failing actuator or solenoid, a binding wastegate rod, or a wiring/hose fault.
High
Can I keep driving? Drivable but down on power — boost control is impaired, and the car may enter limp mode or over/underboost, so fix it before hard driving.
Common symptoms
What you'll notice
- Check-engine light on
- Noticeable loss of power or boost
- Slow or flat acceleration, possible limp mode
- Poor fuel economy
Common causes
Most likely first
- Faulty wastegate 'B' actuator or control solenoidLikely
- Binding, bent, or seized wastegate linkage/actuator rodCommon
- Open, shorted, or corroded wiring and connectors in the solenoid circuitCommon
- Leaking or disconnected boost/vacuum control hosesLess often
- Failed ECM (rare — verify actuator and wiring first)Less often
How to diagnose & fix
Work through it in order
- Scan and read freeze-frame data to see boost conditions when the code set.
- Inspect the wastegate actuator, rod, and linkage for binding or free play.
- Check the solenoid connector and wiring for opens, shorts, and corrosion.
- Verify the boost/vacuum control hoses are intact and routed correctly.
- Test the solenoid's resistance and operation; replace it if out of spec. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0248?+
Short trips are usually fine, but the engine may limit boost or cut power. Avoid hard acceleration until it's repaired.
Can I just clear P0248?+
It will come back as soon as the boost-control fault recurs. The actuator, wiring, or hoses need repair first.
Related codes
Often seen with P0248
Read & clear P0248 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