U02A2
Lost Communication With Reductant Quality Module
U02A2 is an OBD-II diagnostic trouble code meaning: Lost Communication With Reductant Quality Module. Common causes: open or short circuit in the communication circuit, reagent quality module malfunction. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Reduced engine power
- AdBlue error message appears
- Increased fuel consumption
- Problems starting the engine
Causes
- Open or short circuit in the communication circuit
- Reagent quality module malfunction
- Module power problems
- Corrosion of contacts in connectors
- Software error in the ECU
How to Fix
- Check the integrity of the wiring to the module
- Check the module supply voltage
- Inspect connectors for corrosion
- Scan the system for other errors
- If necessary, replace the reagent quality module
Related codes
Error U02A2 by Vehicle Brand
FAQ
What does the U02A2 code mean?
U02A2 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Reductant Quality Module
What causes a U02A2 error code?
The most common causes of U02A2 include: Open or short circuit in the communication circuit; Reagent quality module malfunction; Module power problems; Corrosion of contacts in connectors.
How do I fix a U02A2 diagnostic trouble code?
To fix U02A2: Check the integrity of the wiring to the module. Check the module supply voltage. Inspect connectors for corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U02A2?
Limited driving only, diagnose soon
How much does it cost to fix U02A2?
The estimated repair cost for U02A2 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat