Diesel Exhaust Fluid (Def) Supply And Metering System Malfunctions
WARNING: This page is about a different variant/trim than selected.
The following DEF supply and metering system malfunctions may trigger the message center warning system
- Pressure build up in the supply line
- Metering/injection time to closed loop
- Over pressure in supply line
- Under pressure in supply line
- Injection valve open circuit
- SCR system relay open circuit
- Solenoid pump(s) open circuit
- Combined temperature/level sensor open circuit
- Missing communication with upstream NOx sensor (NAS variants only)
- Missing communication with downstream NOx sensor