P2580Turbocharger/Supercharger Speed Sensor A Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2580 says the signal from turbocharger or supercharger speed sensor A stays at the low end, so the engine computer sees too little or no usable pulse activity - typically from a short to ground, a weak sensor or a pickup that cannot read the target. A Stellantis STAR case from November 2023 for 2022-2024 Ram 2500 to 5500 trucks reports P2580 with the warning lamp, sometimes after few miles; besides the normal circuit tests it asks the technician to pull the sensor and inspect bore and tone wheel with a borescope, since debris or an extra O-ring left in the bore spoiled the signal. P2581 is the high-side counterpart, P2579 an implausible speed with a working circuit. Boost is often reduced.
- What you may notice
- Malfunction indicator lamp on
- Turbo speed reads zero or very low in live data
- Possible boost limitation and reduced power
- Likely causes
- LikelyDebris on the tone wheel or an extra O-ring in the sensor bore
- PossibleSignal wire shorted to ground
- PossibleSpeed sensor A with weak or missing output
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.