OBD-II code · Powertrain (generic, extended)
P2579 Turbocharger/Supercharger Speed Sensor A Circuit Range/Performance
Turbo speed sensor A is electrically intact, but the speed reading does not match the model — for example a speed that does not climb when boost rises, drifts away from the air-mass-flow estimate, or jumps. Often blade-fouling, a contaminated sensor tip or aged element.
Is it safe to drive with P2579?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOil-contaminated sensor tip
- PossibleAged Hall element
- Less likelySensor element aged beyond calibration window
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, Turbocharger
Related codes
- P2578Turbocharger/Supercharger Speed Sensor A Circuit
- P2576Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Intermittent/Erratic
- P2577Direct Ozone Reduction Catalyst Efficiency Below Threshold
- P257AVacuum Reservoir Control Circuit/Open
- P257BVacuum Reservoir Control Circuit Low
- P257CVacuum Reservoir Control Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.