U04A4
Invalid Data Received From Particulate Matter Sensor A
U04A4 is an OBD-II diagnostic trouble code meaning: Invalid Data Received From Particulate Matter Sensor A. Common causes: pm sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Problems with DPF regeneration
- Increased fuel consumption
- Possible errors in the exhaust gas purification system
Causes
- PM sensor malfunction
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Wiring harness damage
- Problems with the engine control unit
How to Fix
- Check the condition of the particle sensor
- Check the integrity of the circuit and connectors
- Clean contacts from corrosion
- Check sensor resistance
- Replace the particle sensor if necessary
Related codes
Error U04A4 by Vehicle Brand
FAQ
What does the U04A4 code mean?
U04A4 is an OBD-II diagnostic trouble code that indicates: Invalid Data Received From Particulate Matter Sensor A
What causes a U04A4 error code?
The most common causes of U04A4 include: PM sensor malfunction; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Wiring harness damage.
How do I fix a U04A4 diagnostic trouble code?
To fix U04A4: Check the condition of the particle sensor. Check the integrity of the circuit and connectors. Clean contacts from corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U04A4?
Yes, but get it checked soon
How much does it cost to fix U04A4?
The estimated repair cost for U04A4 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat