P2D30Cold Start Turbocharger/Supercharger A Overboost
- 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
- P2D30 is the opposite of P2D2F: during the cold start strategy, boost from turbocharger or supercharger A rose above the permitted value. Outside that phase P0234 covers it. CARB lists electronic wastegate position as a cold start feature that has to follow its command, so a gate that stays shut when the strategy wants it open is the classic trigger. No manufacturer documents P2D30 publicly. For the related wastegate check GM's 2019 table for the 2.7 l L3B fails P2C9B when position error exceeds 20 % for more than 1 s under cold start conditions, Type A. GM bulletin 22-NA-002 (Equinox and Terrain 1.5 l) shows how cold causes boost faults: frozen oil and water in the wastegate regulator solenoid and ice inside the intercooler set P0234 or P0299. The module usually cuts power to protect the engine.
- What you may notice
- Sudden power reduction shortly after starting in the cold
- Check engine light, sometimes with P0234 or a wastegate code
- Unusually strong surge of power while the engine is cold
- Likely causes
- LikelyWastegate flap or linkage stuck closed or stiff in the cold
- PossibleWastegate regulator solenoid blocked by frozen moisture or oil deposits
- PossibleElectric wastegate actuator or its position feedback faulty
- RareBoost pressure sensor reading too high
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.