P2566 code meaning
Turbocharger Boost Control Position Sensor A Circuit Intermittent
Powertrain system Generic code P25xx codes Check engine light
What P2566 means
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.
P2566 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2566
- Intermittent loss of power or limp mode
- Check engine light, sometimes going out again
- Surging boost
Common causes of P2566
- Most likelyLoose or corroded pin at the position sensor connector
- PossibleHeat-damaged or chafed sensor wiring near the turbocharger
- PossibleWorn position sensor in the actuator
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Turbo actuator position sensor aBoost control actuator wiringBoost control actuator a
What each part of P2566 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| 66 | The exact fault in that area. |
What to do next
- Note P2566 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2566
What does P2566 mean?
P2566 means "Turbocharger Boost Control Position Sensor A Circuit Intermittent". P2566 reports that the signal from the boost control position sensor flickers or drops out briefly instead of being steadily wrong. It is a generic code, so it means the same on every make.
Is it safe to drive with P2566?
Drive gently and only to a workshop. With P2566 the car can go into limp mode (reduced power) to protect itself.
Will P2566 fail an emissions test?
Yes, it can. P2566 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2566 to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P2566 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.