Priority cause to check
Clogged AdBlue injector
A clogged or crystallized injector can disrupt SCR dosing and contribute to P20EE.Useful checks
- Inspect the injector outlet
- Check the spray pattern
- Look for crystallization
Why this lead?
Fault scan A cause to rule out before the catalyst The injector is consistent with the SCR context and the recorded code.
Field case Similar symptoms Comparable cases point to dosing and blockage checks before replacement.