New Holland 19352 – New Holland Dosing Control Unit Dcu: Reverting Valve (4-2 Way Valve) Mechanically – Valve Does Not Open – P20A0 Vent Valve (Reductant Purge Control Valve) – Open Circuit

The fault code indicates a mechanical issue with the reverting valve (4-2 way valve), which is not opening as expected. Additionally, the P20A0 vent valve (reductant purge control valve) is experiencing an open circuit.

1. 1

   The mechanical operation of the reverting valve (4-2 way valve)

2. 2

   The electrical connection and integrity of the P20A0 vent valve (reductant purge control valve)

1. 1

   Inspect the reverting valve (4-2 way valve) for mechanical obstruction or damage.

   Check for any physical issues that may prevent the valve from opening.

2. 2

   Test the electrical circuit of the P20A0 vent valve (reductant purge control valve).

   Verify that the circuit is complete and that there are no breaks or disconnections.