P0241
Turbocharger/Supercharger Boost Sensor B Circuit Low
Turbo/supercharger boost
Generic OBD-II
High
What it means
P0241 means the ECM sees an abnormally low voltage — typically a short-to-ground or open — in the "B" turbo/supercharger boost pressure sensor circuit. Without a valid boost reading the ECM usually limits boost as a safeguard, so the car runs but feels down on power until the wiring or sensor is repaired.
High
Can I keep driving? Drivable but often in reduced-power mode — with no valid boost signal the ECM tends to limit boost, so acceleration will feel weak until repaired.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power or 'limp mode' with limited boost
- Hesitation or surging during acceleration
- Poor throttle response under load
Common causes
Most likely first
- Short-to-ground or open producing a low signal in the boost sensor 'B' circuitLikely
- Damaged, chafed, or corroded wiring/connector at the boost sensorCommon
- Failed turbo/supercharger boost sensor 'B'Common
- Faulty engine control module (ECM) — least commonLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and check the boost sensor 'B' signal voltage with a scan tool or meter.
- Inspect the sensor connector and wiring for a short to ground, corrosion, or damage.
- Verify the sensor's 5V reference and ground are present, then test the sensor against spec.
- Replace the boost sensor if faulty; if wiring and sensor are good, have the ECM checked. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0241?+
Briefly yes, but expect reduced power. The ECM usually caps boost when the signal is invalid, so repair it before hard or extended driving.
Can I just clear P0241?+
It clears, but a circuit-low fault returns until the short or failed sensor is fixed.
Related codes
Often seen with P0241
Read & clear P0241 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