DTC U029D-87: Lost Communication With NOx Sensor "A" - Missing message: Action

NOTE: A fault clear is NOT sufficient to clear the vehicle 'inducement' system warnings. The 'inducement' warnings automatically clear ONLY upon confirmation of the repair by the vehicle OBD system. The monitoring MUST be executed. The electrical checks normally occur once ignition is on or after engine start

Prioritized Checks to Perform
- Check pre and post NOx sensor connectors are not crossed
- Refer to the appropriate System Wiring Diagram(s) and check the pre selective catalytic reduction NOx sensor/diesel sub net CAN circuit for short circuit to ground, short circuit to power, open circuit, high resistance
- Inspect connectors for signs of water ingress, and pins for damage and/or corrosion
Vehicle Conditions to enable DTC Logging Strategy

Engine running
On completion of the previous repair actions the following MUST be carried out
Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest
NOTE: The engine MIL is OFF (when engine ON)
Start engine
The 'inducement' warning clears automatically once the monitoring has executed and passed with no malfunction. This terminates the drive cycle
NOTE: If the engine MIL shows during the driving cycle, then the malfunction has re-occurred. Further repair is required
Using the manufacturer approved diagnostic system clear all stored DTCs using the 'Diagnosis Menu' tab
NOTE: This clears the fault storage from P2BAE/P2BAF