Volvo Engine D11L (Tier 4) Fault Code: U029D00 Lost Communication With NOx Sensor “A” – No Sub Type Information
Volvo Engine D11L (Tier 4) Fault Code: U029D00 Lost Communication With NOx Sensor “A” – No Sub Type Information
CONTROL UNIT:
Engine ECU
FAILURE EVENT:
Bus communication with NOx sensor before SCR is missing on Engine subnet.
SYMPTOM:
1. SCR system does not work properly.
2. Low power because of engine derate.
3. Display messages about ECU communication problems.
CONDITIONS:
None
INHIBITING THE DTC:
None
POSSIBLE CAUSES:
1. CAN communication error with NOx sensor. Damaged wire harness or connector.
2. Internal error in the NOx sensor.
3. No power supply to NOx sensor.
4. No power supply to ACM.
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