P2599Turbocharger Boost Control Position Sensor A Performance - Stuck High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- Engine warning lamp on
- Overboost cut-out or noticeable power reduction
- Black smoke or rough response under load
- Likely causes
- 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
- RareDefective actuator electronics on smart actuators
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €2,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.