JCB P3411-87: Level too low for aftertreatment 1 SCR catalyst DEF properties

The fault code indicates that the level of DEF (Diesel Exhaust Fluid) for the aftertreatment system's SCR catalyst is too low. This may affect the proper operation of the emissions control system.

1. 1

   DEF level in the reservoir

2. 2

   DEF quality and properties

3. 3

   DEF system sensors

1. 1

   Check the DEF level in the reservoir

   Ensure the DEF reservoir contains sufficient fluid according to the manufacturer's guidelines.

2. 2

   Verify DEF quality and properties

   Confirm that the DEF meets the required specifications and is not contaminated.

3. 3

   Inspect DEF system sensors

   Check for any faults or malfunctions in the sensors that monitor DEF level and properties.