P2599 code meaning
Turbocharger Boost Control Position Sensor A Performance - Stuck High
Powertrain system Generic code P25xx codes Check engine light
What P2599 means
P2599 is the high-side stuck fault for position sensor A: the turbocharger actuator stays at, or reports, a position beyond where it should be, while the sensor circuit itself works. GM documents it twice. On the 2014 Cruze 2.0 L diesel the ECM compares commanded and actual vane position and logs P2599 when the deviation runs past 10 % in the direction opposite to P2598 for 10 s. The 2018 table for GM's smaller diesels checks instead whether the vanes spring back to their fully open rest position once the actuator is released after a P0046; if the reading stays above 15 % (vacuum actuator) or 5 % (smart actuator), the code sets at once as Type A. GM bulletin PI1260 names vacuum leaks as a cause. P2598 is the low-side partner; wiring faults use P2562-P2566.
P2599 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2599
- Engine warning lamp on
- Overboost cut-out or noticeable power reduction
- Black smoke or rough response under load
Common causes of P2599
- Most likelyVanes or wastegate stuck toward the closed position by soot or corrosion
- PossibleWeak return spring or binding linkage that keeps the actuator from its rest position
- PossibleVacuum control solenoid or hose fault on pneumatic actuators
- Less likelyDefective actuator electronics on smart actuators
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 aTurbo actuator
What each part of P2599 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. |
| 99 | The exact fault in that area. |
What to do next
- Note P2599 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 P2599
What does P2599 mean?
P2599 means "Turbocharger Boost Control Position Sensor A Performance - Stuck High". P2599 is the high-side stuck fault for position sensor A: the turbocharger actuator stays at, or reports, a position beyond where it should be, while the sensor circuit itself works. It is a generic code, so it means the same on every make.
Is it safe to drive with P2599?
Drive gently and only to a workshop. With P2599 the car can go into limp mode (reduced power) to protect itself.
Will P2599 fail an emissions test?
Yes, it can. P2599 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 P2599 to fix?
Difficulty: hard. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will P2599 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.