Index storingcodes · medium
P0406
EGR sensor A circuit high
EGR sensor A circuit high
Applies to: 2.0D / 2.2D diesel (Ford Duratorq TDCi), 2003-2009 · Confidence: Platform code set + documented field failures
Common causes
- EGR position sensor failure
- Open circuit or short to B+
Quick checks
- Scan access: Generic OBD-II scan tool / WDS-IDS
Typical fixes
- Check wiring
- Replace the EGR valve assembly