P0047
Turbocharger/Supercharger Boost Control A Circuit Low
Turbo / boost control
Generic OBD-II
High
What it means
P0047 means the ECM detected a low-voltage (short-to-ground or open) condition in the "A" boost control circuit. This circuit drives the wastegate/boost control solenoid, so a fault limits boost and usually triggers reduced-power mode. The cause is electrical — solenoid, connector, or wiring — not a misfire, despite how some databases label it.
High
Can I keep driving? Yes, with reduced power — a boost-control circuit fault often triggers reduced-power or limp mode; drive gently until repaired.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power, especially at higher speeds
- Slow or flat acceleration
- Possible reduced-power / limp mode
Common causes
Most likely first
- Short-to-ground or open (low-voltage fault) in the boost control solenoid circuitLikely
- Failed turbo wastegate / boost control solenoidCommon
- Corroded or loose electrical connectorsCommon
- Damaged wiring in the control circuitLess often
- ECM control-circuit driver faultLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data to confirm the operating conditions.
- Inspect the boost control solenoid connector and wiring for shorts-to-ground or opens.
- Measure the solenoid resistance against spec.
- Verify power and ground at the solenoid connector.
- Replace the boost control solenoid if faulty; suspect the ECM only after wiring is verified.
FAQ
Quick answers
Is it safe to drive with P0047?+
You can drive gently, but boost is limited and the car may be in limp mode. Repair it soon so you're not stuck with reduced power.
Can I just clear P0047?+
It returns until the low-voltage circuit fault or the solenoid is repaired.
Related codes
Often seen with P0047
Read & clear P0047 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