Possible Causes
WARNING: This page is about a different variant/trim than selected.
- Purpose of the DTC
- Selective catalytic reduction - diesel exhaust fluid delivery efficiency by active monitoring
- Electrical Cause
- No
- Mechanical Cause
- Yes
- Control Module Cavity
- Not applicable
- Monitor Description
- Selective catalytic reduction - Nox conversion efficiency is below threshold; the diesel exhaust fluid dosing module delivery is greatly reduced
- Prioritized List of Possible Causes
- Defective DEF reagent delivery
- Defective SCR catalyst (aged)
- Deficient DEF reagent delivery
- Diesel exhaust fluid injector partial delivery
- Damaged exhaust metal work
- SCR catalyst damage