EGR Cooler Bypass Position Sensor Exceeded Learning Limit Bank 1
The bypass valve position sensor learning has reached its software-side limit on bank 1 - typically heavy soot deposits have shifted the mechanical zero beyond the design adaptation range.
Affected components
- Egr cooler bypass position sensor b1
Common causes
- High likelihood: Heavy carbon build-up on valve seat
Possible symptoms
- Check engine light on
- Pinging or knocking under load
- Power loss and hesitation
- Possible rough idle
- Failed emissions inspection (NOx)
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.