JCB P2200-61: Invalid signal from upstream NOx sensor after heater release

The system detects an invalid signal from the upstream NOx sensor following the heater release phase. This may indicate a problem with the sensor's functionality or its connection.

1. 1

   Upstream NOx sensor

2. 2

   Sensor wiring

3. 3

   Sensor connector

1. 1

   Inspect

   Check the upstream NOx sensor for physical damage or signs of wear.

2. 2

   Test

   Verify the integrity of the sensor wiring and connections.

3. 3

   Measure

   Use a multimeter to check for proper voltage and signal output from the sensor.