Description:

This diagnostic code signals a fault with the aftertreatment inlet NOx sensor, which has detected an issue with measuring NOx levels accurately. This sensor is vital for monitoring exhaust gases and ensuring the effectiveness of emission control systems.

Reaction:

The ECU may trigger a derate or implement other protective measures to prevent engine damage and control emissions under faulty sensor conditions.

Recommendations:

• Inspect NOx Sensor: Examine the sensor for signs of damage or wear that could impair its function.
• Test Sensor Accuracy: Use diagnostic equipment to test the NOx sensor’s accuracy against known values.
• Replace Sensor if Necessary: If the sensor is found to be faulty, replace it to ensure reliable NOx measurement.
• Reset ECU and Perform Emissions Test: After replacing the sensor, reset the ECU to clear any stored codes and perform an emissions test to verify that all readings are within regulatory limits.

Note:

Proper function of the NOx sensors is critical for maintaining compliance with emissions standards. Timely diagnosis and replacement of faulty sensors are essential to avoid regulatory penalties and ensure optimal engine performance.