New Holland 3725 – ENGINE: Lambda Sensor Short to Ground at IA, IP, UN, VG

The Lambda Sensor is experiencing a short to ground at the specified terminals: IA, IP, UN, and VG. This fault indicates an electrical issue within the sensor or its wiring that requires investigation.

1. 1

   The wiring and connections of the Lambda Sensor at terminals IA, IP, UN, and VG

2. 2

   The integrity of the Lambda Sensor itself

3. 3

   The presence of moisture or damage in the sensor's housing or wiring

1. 1

   Inspect

   Inspect the wiring and connections of the Lambda Sensor at terminals IA, IP, UN, and VG for signs of damage, corrosion, or improper grounding.

2. 2

   Test

   Test the Lambda Sensor for continuity and resistance using a multimeter, following the service manual procedures.

3. 3

   Replace

   If the Lambda Sensor is found to be faulty, replace it with a compatible component.