U040F
Invalid Data Received From Reductant Control Module
U040F is an OBD-II diagnostic trouble code meaning: Invalid Data Received From Reductant Control Module. Common causes: reagent control module malfunction, open or short circuit in the communication circuit. Estimated repair cost: $56–278.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Increased fuel consumption
- AdBlue system error message
- Problems starting the engine
Causes
- Reagent control module malfunction
- Open or short circuit in the communication circuit
- Poor contact in connectors
- Software error in ECU
- Module power problems
How to Fix
- Check the integrity of wiring and connectors
- Check the power supply and ground of the module
- Read reagent module error codes
- Update ECU software
- Replace reagent control module if necessary
Related codes
Error U040F by Vehicle Brand
FAQ
What does the U040F code mean?
U040F is an OBD-II diagnostic trouble code that indicates: Invalid Data Received From Reductant Control Module
What causes a U040F error code?
The most common causes of U040F include: Reagent control module malfunction; Open or short circuit in the communication circuit; Poor contact in connectors; Software error in ECU.
How do I fix a U040F diagnostic trouble code?
To fix U040F: Check the integrity of wiring and connectors. Check the power supply and ground of the module. Read reagent module error codes. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U040F?
Yes, but get it checked soon
How much does it cost to fix U040F?
The estimated repair cost for U040F is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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