JCB P2202-00: Upstream NOx Sensor Reading Below Minimum Threshold

The system has detected that the upstream NOx sensor is providing a reading that is below the minimum threshold. This may indicate a problem with the sensor or its associated circuitry.

1. 1

   The upstream NOx sensor

2. 2

   The wiring and connections to the upstream NOx sensor

3. 3

   The component identified by this code

1. 1

   Inspect

   Inspect the upstream NOx sensor for damage or contamination.

2. 2

   Check

   Check the wiring and connections to the upstream NOx sensor for looseness, corrosion, or damage.

3. 3

   Test

   Test the upstream NOx sensor for proper operation using the manufacturer's recommended procedure.