P2590Turbocharger Boost Control Position Sensor B Circuit Intermittent/Erratic
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2590 is set when the position signal of the second boost actuator flickers, jumps or drops out for short moments instead of being steadily wrong. Unlike its sensor A counterpart P2566, this code is defined as intermittent/erratic, so an unsteady signal without full dropouts falls under it as well. No manufacturer documents P2590 publicly. For sensor A, VW bulletins 21-15-04 and 21-15-06 on 2009-2014 2.0 L TDI models group P2566 with the other position codes, locate sensor G581 in the vacuum diaphragm and start the repair at hoses, diaphragm and actuator travel. Typical are loose terminals or a sensor track worn by vibration. Steady faults on sensor B are P2586, P2588 and P2589.
- What you may notice
- Power surging or dropping intermittently
- Warning lamp that may come and go
- Jumping position value for actuator B in live data
- Likely causes
- LikelyLoose terminal or intermittent contact in the sensor B connector
- PossibleSensor track worn by vibration, giving a noisy signal
- PossibleChafed harness that shorts or opens briefly
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €60 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.