U04A3
Invalid Data Received From Hybrid/EV Battery Interface Control Module C
U04A3 is an OBD-II diagnostic trouble code meaning: Invalid Data Received From Hybrid/EV Battery Interface Control Module C. Common causes: problems with the can bus, broken or damaged wiring to the battery control module. Estimated repair cost: $56–278.
Symptoms
- Check Engine light comes on
- Reduced vehicle power
- Switching to emergency mode
- Battery charging problems
- Error message on the dashboard
Causes
- Problems with the CAN bus
- Broken or damaged wiring to the battery control module
- Battery control module C fault
- Control module power problems
- Corrosion of contacts or connectors
How to Fix
- Check the integrity of the wiring and connectors to the battery control module
- Check the state of the CAN bus and its terminators
- Read additional trouble codes for accurate diagnosis
- Check power and grounding of the control module
- Repair only from an authorized dealer
Related codes
Error U04A3 by Vehicle Brand
FAQ
What does the U04A3 code mean?
U04A3 is an OBD-II diagnostic trouble code that indicates: Invalid Data Received From Hybrid/EV Battery Interface Control Module C
What causes a U04A3 error code?
The most common causes of U04A3 include: Problems with the CAN bus; Broken or damaged wiring to the battery control module; Battery control module C fault; Control module power problems.
How do I fix a U04A3 diagnostic trouble code?
To fix U04A3: Check the integrity of the wiring and connectors to the battery control module. Check the state of the CAN bus and its terminators. Read additional trouble codes for accurate diagnosis. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U04A3?
Do not drive — repair immediately
How much does it cost to fix U04A3?
The estimated repair cost for U04A3 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat