John Deere 1347.16 – ECU: Suction Control Valve Sticking and Fuel Rail Pressure Moderately High

The engine control system detects that the actual fuel rail pressure is significantly higher than the desired/expected pressure, typically due to a mechanical sticking of the Suction Control Valve (SCV) on the high-pressure fuel pump.

• 5085E
• 5090E
• 5090EL
• 5100E
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 5085M
• 5100M
• 5100MH
• 5100ML
• 5115ML
• 8235R
• 8260R
• 8285R
• 8310R
• 8335R
• 8360R
• 8310RT
• 8335RT
• 8360RT
• 8400R
• 9470RT
• 9520RT
• 9570RT
• 7200J
• 7225J
• 7230J
• 6090MC
• 6100MC
• 6110MC
• 6090RC
• 6100RC
• 6110RC
• 210GLC
• 350GLC
• 644K
• 724K
• 744K
• S650
• S660
• S670
• 4730
• 4830
• 4930

1. 1

   Restart the engine to see if the code clears or returns, as it could be a momentary glitch.

2. 2

   Inspect fuel for contamination, debris, or high biofuel concentrations.

3. 3

   Check the suction side of the fuel pump for air leaks, restrictions, or collapsed lines, and replace fuel filters if not serviced recently.

4. 4

   Verify the wiring harness to the Suction Control Valve for shorts, high resistance, or poor connections.

5. 5

   Check the fuel rail pressure sensor and its wiring to ensure it is not sending a false high pressure signal to the ECU.

1. 1

   Clear Codes and Test

   Clear the ECU fault codes and run the machine under load. If the code does not return, the issue may have been temporary.

2. 2

   Service the Fuel System

   If the code returns, drain the water separator and replace the primary and secondary fuel filters. Inspect all low-pressure fuel lines for 90-degree fitting blockages or air intrusion.

3. 3

   Replace the Suction Control Valve (SCV)

   If fuel supply is clean and unrestricted, replace the Suction Control Valve on the high-pressure fuel pump. The valve is likely sticking open, over-pressurizing the rail.

4. 4

   Replace the Fuel Rail Pressure Sensor

   If a new SCV does not resolve the issue, the fuel rail pressure sensor may be internally damaged or skewed, requiring replacement.

5. 5

   Final Verification

   Clear all diagnostic trouble codes and operate the machine at working RPMs to ensure actual rail pressure matches desired rail pressure.