P2D30
Cold Start Turbocharger/Supercharger A Overboost
During cold start, turbocharger/supercharger A produces boost pressure above the cold-start target. Wastegate sticking closed or boost control overshoot.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Common causes
Ordered by how often each turns out to be the cause.
- Wastegate sticking closed at coldCommon
- Boost control overshoot at coldPossible
Parts involved
- Turbocharger A
- Wastegate A
P2D30 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.