Powertrain, generic (extended)

P2586 Turbocharger Boost Control Position Sensor B Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2586 covers a general electrical fault at position sensor B, which reports where the second boost control actuator stands - the vane mechanism or electric wastegate of a second turbocharger on engines that regulate two of them separately. The engine computer cannot use the feedback, without the fault being pinned down as low (P2588), high (P2589) or sporadic (P2590); P2587 is a position mismatch with a working circuit. No manufacturer documents P2586 publicly. CARB requires the sensors of the boost control system to be monitored as comprehensive components. For sensor A, Kia service action SA078 on the 2011 Optima 2.0 T-GDI pairs the circuit code P2562 with an electric wastegate actuator whose rod length must be reset. Boost is usually limited.

Likely causes

Connector or terminal fault at the actuator B position sensor
Harness to actuator B damaged by exhaust heat
Position sensor inside actuator B failed (often replaced as a unit)

Symptoms

  • Malfunction indicator lamp on
  • Reduced power because boost is capped
  • No valid position value for actuator B in live data

Repair estimate

DifficultyHardWorkshop job
Parts and labour€80–1,500
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

P2587P2588P2589P2590P2562

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