JCB P2203-17: Downstream NOx Sensor Reading Exceeds Maximum Threshold

The downstream NOx sensor is reporting a value that is above the maximum threshold, indicating an abnormal condition in the exhaust system.

1. 1

   the downstream NOx sensor

2. 2

   the wiring and connections to the downstream NOx sensor

3. 3

   the exhaust system for leaks or damage

1. 1

   Inspect

   Inspect the downstream NOx sensor for physical damage or contamination.

2. 2

   Test

   Test the wiring and connections to the downstream NOx sensor for continuity and proper voltage.

3. 3

   Examine

   Examine the exhaust system for leaks, cracks, or damage that could affect sensor readings.