P02E1
Diesel Intake Air Flow A Control Performance
Diesel intake air-flow control A is electrically OK but does not move the throttle plate as commanded — typically carbon buildup or seized actuator.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Carbon buildup blocks flap travelCommon
Parts involved
- Diesel Intake Throttle
P02E1 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.