New Holland 3713 – ENGINE: Lambda Sensor: Open Load Error of the LSU Heater Power Stage

The fault code indicates an open load error in the power stage of the LSU heater associated with the Lambda Sensor. This suggests a problem with the electrical circuit supplying power to the heater.

1. 1

   The wiring and connections to the Lambda Sensor

2. 2

   The power stage circuit for the LSU heater

3. 3

   The Lambda Sensor itself for damage or failure

1. 1

   Inspect the wiring and connections to the Lambda Sensor

   Check for loose, damaged, or corroded connections that may cause an open load condition.

2. 2

   Test the power stage circuit for the LSU heater

   Use a multimeter to verify continuity and proper voltage in the circuit supplying power to the heater.

3. 3

   Check the Lambda Sensor for damage or failure

   Visually inspect the sensor for signs of damage and consider testing it with appropriate diagnostic tools.