Turbocharger/Supercharger Speed Sensor A Circuit Low
What it means
P2580 means the sensor that measures how fast your turbocharger or supercharger is spinning is sending an abnormally low (or open) signal to the engine computer. Without a trusted speed reading, the ECM can't safely manage boost, so it often limits power or drops into limp mode. The cause is usually the sensor, its wiring, or a corroded connector rather than the turbo itself.
Can I keep driving? Usually drivable, but you may feel reduced power or limp mode until it's fixed.
Real-world scan data
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power or limp mode
- Less boost than usual / sluggish acceleration
Common causes
Most likely first
- Faulty turbocharger/supercharger speed sensorLikely
- Sensor wiring shorted to ground or open (low signal)Common
- Corroded or loose connector at the sensorCommon
- ECM driver or reference fault (rule out wiring first)Less often
How to diagnose & fix
Work through it in order
- Inspect the speed-sensor connector and wiring for damage, corrosion, or a short to ground.
- Check the sensor's reference and signal circuits against spec with a meter.
- Replace the turbo/supercharger speed sensor if the circuit checks out but the signal stays low.
- Clear the code and road-test to confirm boost reads correctly.
FAQ
Quick answers
Is it safe to drive with P2580?+
Can I just clear P2580?+
Related codes
Read & clear P2580 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.