U02A1
Lost Communication With NOx Sensor C
U02A1 is an OBD-II diagnostic trouble code meaning: Lost Communication With NOx Sensor C. Common causes: open or short circuit in the nox sensor circuit, malfunction of the nox sensor itself. Estimated repair cost: $56–278.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Increased fuel consumption
- Unstable engine idling
- Possible transition to emergency mode
Causes
- Open or short circuit in the NOx sensor circuit
- Malfunction of the NOx sensor itself
- Connector problems or contact corrosion
- ECU malfunction
- Wiring harness damage
How to Fix
- Check the continuity of the NOx sensor circuit
- Inspect the connectors and contacts of the sensor for damage
- Check the power supply and ground of the sensor
- Replace NOx sensor if necessary
- Check and update the ECU firmware
Related codes
Error U02A1 by Vehicle Brand
FAQ
What does the U02A1 code mean?
U02A1 is an OBD-II diagnostic trouble code that indicates: Lost Communication With NOx Sensor C
What causes a U02A1 error code?
The most common causes of U02A1 include: Open or short circuit in the NOx sensor circuit; Malfunction of the NOx sensor itself; Connector problems or contact corrosion; ECU malfunction.
How do I fix a U02A1 diagnostic trouble code?
To fix U02A1: Check the continuity of the NOx sensor circuit. Inspect the connectors and contacts of the sensor for 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 U02A1?
Yes, but get it checked soon
How much does it cost to fix U02A1?
The estimated repair cost for U02A1 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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