Diesel Exhaust Fluid Supply And Metering System Malfunctions
WARNING: This page is about a different variant/trim than selected.
The OBD system monitors components and the functionality of the DEF supply and metering system. If a malfunction is detected a message center warning is displayed. If no action is taken to rectify the warning malfunction, this will eventually lead to a 'No engine restart' situation
| STAGES | CAUSE | WARNING | MESSAGE | DESCRIPTION |
|---|---|---|---|---|
| Stage 1 | Supply system or monitoring component malfunction | Amber symbol | No engine restart possible in 515mls/830km. Diesel Exhaust Fluid system malfunction | The DEF supply system or component used for monitoring is malfunctioning. The system must be checked by a Jaguar Land Rover service department |
| Stage 2 | Supply system or monitoring component malfunction | Red symbol | No engine restart possible. Diesel Exhaust Fluid system malfunction | The DEF supply system or component used for monitoring is malfunctioning. The system must be checked by a Jaguar Land Rover service department |
Diesel Exhaust Fluid Supply and Metering System Malfunctions
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