Possible Causes
WARNING: This page is about a different car, the 2018 Land Rover Range Rover, 2017 Land Rover Range Rover, and 2016 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.
- Purpose of the DTC
- Selective catalytic reduction - reduced catalyst Nox conversion efficiency in ammonia pressure control mode
- The SCR device ammonia storage capability is greatly reduced or the device is missing
- Electrical Cause
- No
- Mechanical Cause
- Yes
- Control Module Cavity
- Not applicable
- Monitor Description
- SCR - reduced catalyst Nox conversion efficiency detected by passive monitoring but not detected by active monitoring; on two consecutive occasions
- The SCR device ammonia storage capability is greatly reduced or the device is missing
- Prioritized List of Possible Causes
- Defective SCR catalyst (aged)
- Deficient DEF reagent delivery
- Diesel exhaust fluid injector partial delivery
- Damaged exhaust metal work
- SCR catalyst damage