Powertrain, generic (extended)

P2590 Turbocharger Boost Control Position Sensor B Circuit Intermittent/Erratic

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Loose terminal or intermittent contact in the sensor B connector
Sensor track worn by vibration, giving a noisy signal
Chafed harness that shorts or opens briefly

Symptoms

  • Power surging or dropping intermittently
  • Warning lamp that may come and go
  • Jumping position value for actuator B in live data

Repair estimate

DifficultyHardWorkshop job
Parts and labour€60–1,500
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

turbo actuator position sensor bsensor wiring

Related codes

P2586P2587P2588P2589P2566

References: law.cornell.edu, static.nhtsa.gov.