U05A1
NOx Sensor A Received Invalid Data From ECM/PCM
U05A1 is an OBD-II diagnostic trouble code meaning: NOx Sensor A Received Invalid Data From ECM/PCM. Common causes: nox sensor malfunction, damage to the wiring to the nox sensor. Estimated repair cost: $167–444.
Symptoms
- Increased fuel consumption
- Check Engine Light Illuminates
- Reduced engine power
- Unpleasant exhaust smell
- Possible transition to emergency mode
Causes
- NOx sensor malfunction
- Damage to the wiring to the NOx sensor
- Problems with sensor connectors
- Engine control unit malfunction
- Software error in ECM/PCM
How to Fix
- Check the integrity of the wiring to the NOx sensor
- Inspect the sensor connectors for corrosion or damage.
- Check NOx sensor readings using a diagnostic scanner
- If necessary, replace the NOx sensor
- Update ECM/PCM software
Related codes
Error U05A1 by Vehicle Brand
FAQ
What does the U05A1 code mean?
U05A1 is an OBD-II diagnostic trouble code that indicates: NOx Sensor A Received Invalid Data From ECM/PCM
What causes a U05A1 error code?
The most common causes of U05A1 include: NOx sensor malfunction; Damage to the wiring to the NOx sensor; Problems with sensor connectors; Engine control unit malfunction.
How do I fix a U05A1 diagnostic trouble code?
To fix U05A1: Check the integrity of the wiring to the NOx sensor. Inspect the sensor connectors for corrosion or damage.. Check NOx sensor readings using a diagnostic scanner. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U05A1?
Yes, but get it checked soon
How much does it cost to fix U05A1?
The estimated repair cost for U05A1 is $167–444. Actual cost depends on your vehicle, location, and labor rates.
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