P02E9
Diesel Intake Air Flow A Position Sensor Circuit High
Diesel Intake Air Flow A Position Sensor Circuit High: the signal voltage is above the expected range. Often an open circuit or a short to supply voltage.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Open signal lineCommon
- Connector pins corroded - high contact resistanceLess likely
- Supply wire pinched against B+ sourceLess likely
Parts involved
- Diesel Intake Throttle Position Sensor
P02E9 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.