New Holland 3707: Lambda Sensor: Open Circuit at Nernst Cell Pin

The fault code indicates an open circuit at the Nernst cell pin of the lambda sensor. This condition prevents proper signal transmission from the lambda sensor, which can affect engine performance and emissions control.

1. 1

   The wiring and connections to the lambda sensor

2. 2

   The integrity of the Nernst cell pin on the lambda sensor

3. 3

   The electrical continuity between the lambda sensor and the controller

1. 1

   Inspect

   Check the wiring and connectors of the lambda sensor for damage, corrosion, or loose connections.

2. 2

   Test

   Use a multimeter to test the electrical continuity between the Nernst cell pin of the lambda sensor and the controller.

3. 3

   Replace

   If the open circuit is confirmed, replace the lambda sensor with a compatible unit.