P2598Turbocharger Boost Control Position Sensor A Performance - Stuck Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2598 means the boost control position of turbocharger A, normally the vane or wastegate position reported by the actuator, appears stuck toward its low end: the measured value no longer follows the command although the signal is electrically valid. Ford's 2023 diesel OBD summary runs this check with closed-loop position control active above 500 rpm and flags a gap of more than 15 % in either direction lasting 25 s, with an extra variant during cold start. GM's 2018 table for its smaller diesels reads it as vanes jammed more open than requested (640 of 800 samples, Type A). GM bulletin PI1260 blames vacuum leaks for it on the 2014 Cruze with the 2.0 L diesel, and 17-NA-301 says a P2598 found at pre-delivery on 2017-2018 Cruze, Equinox and Terrain diesels may just be cleared. P2599 is the high-side partner. Expect reduced power.
- What you may notice
- Engine warning lamp on
- Lack of power under load, boost limited
- Unusual turbo noise
- Likely causes
- LikelySooted or seized variable vanes that no longer follow the actuator
- PossibleVacuum leak or kinked hose on pneumatically driven actuators
- PossibleWorn or failed electric vane actuator
- RareOne-off entry from unusual operation, e.g. after delivery transport
- 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.