Massey Ferguson 0A.42.13 – Vehicle Control Unit or Implement/Hydraulic Control Module: External Hydraulic Valve 4 Issue

This code is generated when the tractor's onboard diagnostic system detects a fault—typically an electrical connection problem, solenoid failure, or functional issue—on the 4th external hydraulic remote/spool valve.

• 7724S
• 5712SL
• 7722
• 7722S
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7726S
• 5711SL
• 7718S
• 7719
• 7714
• 7716S
• 7720
• Tier 4 (2015-2021)
• 7715S
• 7724
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626

1. 1

   Use a compatible diagnostic tool or interface device to confirm that 0A.42.13 is the active code

2. 2

   Thoroughly inspect the electrical connector at External Hydraulic Valve 4 for connection problems

3. 3

   Look for damaged wires, corrosion, or loose pins between the valve solenoid and the wiring harness

1. 1

   Locate Valve 4

   Locate the external hydraulic valve stack at the rear of the tractor and identify Valve 4.

2. 2

   Inspect and clean connector

   Disconnect the electrical connector to the Valve 4 solenoid. Clean the contacts and check for any signs of moisture or corrosion.

3. 3

   Test wiring harness

   Test the wiring harness for continuity to ensure there are no breaks in the line communicating with the diagnostic system.

4. 4

   Evaluate internal valve issues

   If the wiring and connections are sound, the issue is likely internal to the valve's electrical solenoid or the spool itself is binding.

5. 5

   Replace valve/solenoid

   Replace the faulty external hydraulic valve / solenoid assembly.

6. 6

   Clear DTCs and test

   Clear the DTCs using your diagnostic tool and test the hydraulic remote to ensure the issue is resolved.