OBD-II code · Powertrain (generic, extended)
P2581 Turbocharger/Supercharger Speed Sensor A Circuit High
Turbo speed sensor A signal voltage above the upper limit — short to reference voltage or open signal return.
Is it safe to drive with P2581?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal wire shorted to reference voltage
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.6–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Turbo Speed Sensor A, Sensor Wiring
Related codes
- P2578Turbocharger/Supercharger Speed Sensor A Circuit
- P257EEngine Hood Switch Circuit Low
- P257FEngine Hood Switch Circuit High
- P2580Turbocharger/Supercharger Speed Sensor A Circuit Low
- P2582Turbocharger/Supercharger Speed Sensor A Circuit Intermittent
- P2583Cruise Control Front Distance Range Sensor Single Sensor or Center
- P2584Fuel Additive Control Module Requested MIL Illumination
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.