New Holland 3709: Lambda Sensor Virtual Ground Pin Open Circuit

The fault code indicates an open circuit at the virtual ground pin of the lambda sensor. This condition prevents proper signal transmission from the lambda sensor to the controller.

1. 1

   The wiring and connections at the lambda sensor virtual ground pin

2. 2

   The integrity of the lambda sensor itself

3. 3

   The electrical continuity of the circuit leading to the virtual ground pin

1. 1

   Inspect

   Check the wiring and connections at the lambda sensor virtual ground pin for damage, corrosion, or loose contact.

2. 2

   Test

   Use a multimeter to test the electrical continuity of the circuit leading to the virtual ground pin.

3. 3

   Replace

   If damage or failure is found, replace the affected circuit or the lambda sensor as necessary.