John Deere 004334.01: DEF System Pressure Low

The system indicates that the DEF (Diesel Exhaust Fluid) system pressure is low. This may affect the proper operation of the emissions control system.

1. 1

   DEF system pressure sensor

2. 2

   DEF fluid level

3. 3

   DEF system piping and connections

1. 1

   Inspect

   Check the DEF fluid level to ensure it is within the recommended range.

2. 2

   Inspect

   Examine the DEF system piping and connections for leaks, damage, or blockages.

3. 3

   Test

   Verify the operation of the DEF system pressure sensor and its wiring.