Case IH P20A0: Vent Valve (Reductant Purge Control Valve) - Open Circuit

The system has detected an open circuit in the vent valve (reductant purge control valve). This condition may prevent the proper operation of the reductant purge control system.

1. 1

   Wiring connections to the vent valve

2. 2

   Circuit continuity to the vent valve

3. 3

   Physical integrity of the vent valve wiring

1. 1

   Inspect

   Check the wiring connections to the vent valve for looseness, damage, or corrosion.

2. 2

   Test

   Use a multimeter to test the circuit continuity between the controller and the vent valve.

3. 3

   Replace

   If the circuit is open and the wiring is damaged, replace the affected wiring or the vent valve as needed.