P02FA
Diesel Intake Air Flow Position Sensor Minimum/Maximum Stop Performance
The diesel intake throttle position sensor does not reach the calibrated minimum or maximum stop value during a self-test sweep — typically sensor wear, mechanical stop misalignment, or a sticky throttle plate.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Sensor or mechanical stop wornCommon
Parts involved
- Diesel Intake Throttle Position Sensor
- Diesel Intake Throttle
P02FA 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.