Massey Ferguson 0A.41.20 – Onboard diagnostic (OBD) system: External Hydraulic Valve 4 Issue

Malfunction with the fourth external hydraulic valve. A closely related code (0A.41.FF) indicates a connection problem, providing context that the issue is likely electrical or connection-based.

• 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

   Enter Diagnostic Mode on the tractor's control panel to view active or stored error codes

2. 2

   Inspect the wiring harness and electrical connectors leading to External Hydraulic Valve 4 for corrosion, loose pins, or damage

3. 3

   Use a compatible Massey Ferguson diagnostic tool or interface device to verify the exact nature of the fault before replacing parts

1. 1

   Address the Root Cause

   Repair any damaged wiring or secure loose connections at the hydraulic valve. If the valve itself has failed internally, replace the spool valve assembly.

2. 2

   Clear the DTC

   Once the physical repair is complete, use the diagnostic tool to clear the fault codes. Clearing codes without fixing the underlying issue will result in the code returning.

3. 3

   Confirm Repair

   Run the tractor and operate the hydraulic system to ensure the onboard diagnostic system confirms no DTCs are present.