P25B3Turbocharger/Supercharger Wastegate A Stuck Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P25B3 says the wastegate of turbocharger A stays further open than the module commands, so exhaust bypasses the turbine and boost falls short. On Ford EcoBoost engines with an electric wastegate actuator and position sensor, the PCM compares commanded and measured position; a gap above 20 mm held for 2.5 s sets the code, provided no circuit fault (P0243, P2ABD) is present. The 2024 summary reports it as P0243 with failure type 72. Ford bulletins SSM 49427 and 50171 cover 2.0/2.3 L EcoBoost models from 2019 (Edge, Escape, Ranger, Explorer, Bronco Sport and others) with a missing e-clip, a dead actuator or a damaged actuator rod; a service kit replaces actuator, rod and clips without a new turbocharger. Toyota lists P25B3-72 on the 2022 Tundra V35A and released new ECM software for it on the 2023 GR Corolla. Expect lack of power.
- What you may notice
- Clearly reduced power and slow boost build-up
- Check engine lamp on, often with an underboost code
- Wrench or reduced power warning on some models
- Likely causes
- LikelyMissing retaining clip disconnecting actuator rod from the wastegate lever
- PossibleElectric wastegate actuator failed or rod bent
- PossibleWastegate flap or bushing seized in the open position by heat or carbon
- RareDiagnostic calibration needing an update (Toyota GR Corolla)
- 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: €250 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.