Powertrain, generic (extended)

P2589 Turbocharger Boost Control Position Sensor B Circuit High

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

P2589 means the signal that position sensor B returns for the second boost actuator sits above its plausible maximum, typically from an open signal or ground wire, a short to the reference or battery voltage, or a sensor with a defective output. No manufacturer documents P2589 publicly. For sensor A, GM's 2018 diesel engine table triggers P2565 at an analog value above 95 % in 200 of 250 samples, Type A with the lamp on the first trip, and Kia's service action SA149 for the 2011-2012 Sportage 2.0 T-GDI pairs P2565 with a software update and an adjustment of the wastegate rod until the position voltage reads about 3.8 to 4.1 V. P2588 is the low-side fault, P2565 the same fault on sensor A. Boost is usually reduced.

Likely causes

Open signal or ground wire of position sensor B

Signal wire shorted to reference or battery voltage

Failed position sensor B

Wastegate rod set so the sensor reads at its upper end

Symptoms

Malfunction indicator lamp on, often on the first trip
Reduced power with boost capped
Position of actuator B stuck near the maximum 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

P2586 P2587 P2588 P2590 P2565

References: law.cornell.edu, gsi.ext.gm.com, static.nhtsa.gov.