Powertrain, generic (extended)

P2566 Turbocharger Boost Control Position Sensor A Circuit Intermittent

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2566 reports that the signal from the boost control position sensor flickers or drops out briefly instead of being steadily wrong. VW bulletins 21-15-04 (2015) and 21-15-06 (2020) for 2009-2014 Jetta, Golf and Jetta SportWagen with the 2.0 L TDI (CBEA, CJAA) list P2566 together with P2562-P2565 and P0299 for the complaint of lacking power; there the position sensor G581 sits in the vacuum diaphragm, and the repair path starts with vacuum hoses, diaphragm and the actuator travel. No thresholds are published. CARB requires turbocharger electronic components to be monitored as comprehensive components. P2563 is the plausibility fault, P2564/P2565 a steady low or high signal. Expect intermittent power loss and a warning light.

Likely causes

Loose or corroded pin at the position sensor connector
Heat-damaged or chafed sensor wiring near the turbocharger
Worn position sensor in the actuator

Symptoms

  • Intermittent loss of power or limp mode
  • Check engine light, sometimes going out again
  • Surging boost

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–1,200
Time0.5–4 h

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

Parts involved

turbo actuator position sensor aboost control actuator wiringboost control actuator a

Related codes

P2562P2563P2564P2565P0299

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