U029E
Lost Communication With NOx Sensor B
U029E is an OBD-II diagnostic trouble code meaning: Lost Communication With NOx Sensor B. Common causes: broken or damaged wires to nox b sensor, malfunction of the nox b sensor itself. Estimated repair cost: $56–278.
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Increased fuel consumption
- Activation of emergency operation
- Problems with passing inspection due to emissions
Causes
- Broken or damaged wires to NOx B sensor
- Malfunction of the NOx B sensor itself
- Problems with sensor connectors
- Engine ECU malfunction
- Short circuit in the sensor circuit
How to Fix
- Check the integrity of the wiring harness to the NOx B sensor
- Inspect the sensor connectors for corrosion or damage.
- Check the power supply and ground of the sensor
- Test or replace NOx B sensor
- Check ECU software for updates
Related codes
Error U029E by Vehicle Brand
FAQ
What does the U029E code mean?
U029E is an OBD-II diagnostic trouble code that indicates: Lost Communication With NOx Sensor B
What causes a U029E error code?
The most common causes of U029E include: Broken or damaged wires to NOx B sensor; Malfunction of the NOx B sensor itself; Problems with sensor connectors; Engine ECU malfunction.
How do I fix a U029E diagnostic trouble code?
To fix U029E: Check the integrity of the wiring harness to the NOx B sensor. Inspect the sensor connectors for corrosion or damage.. Check the power supply and ground of the sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U029E?
Yes, but get it checked soon
How much does it cost to fix U029E?
The estimated repair cost for U029E is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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