JCB P3403-87: Concentration too low for aftertreatment 1 SCR catalyst DEF properties

The system has detected that the concentration of the aftertreatment fluid for the first SCR catalyst is too low, which may affect the proper operation of the emissions control system.

1. 1

   The level of the aftertreatment fluid

2. 2

   The quality and concentration of the aftertreatment fluid

3. 3

   The sensor or component that monitors the aftertreatment fluid properties

1. 1

   Check the level of the aftertreatment fluid

   Ensure the fluid is at the recommended level as specified in the service manual.

2. 2

   Verify the quality and concentration of the aftertreatment fluid

   Use the appropriate testing equipment to confirm the fluid meets the required specifications.

3. 3

   Inspect the sensor or component that monitors the aftertreatment fluid properties

   Check for any signs of damage, contamination, or malfunction.