U01A3
Lost Communication With Hybrid/EV Battery Interface Control Module D
U01A3 is an OBD-II diagnostic trouble code meaning: Lost Communication With Hybrid/EV Battery Interface Control Module D. Common causes: open or short circuit in the can/lin bus wiring, hybrid battery control module malfunction. Estimated repair cost: $167–889.
Symptoms
- Hybrid system does not activate
- Dashboard warning lights (hybrid system, battery)
- Reduced power or transition to emergency mode
- Inability to charge high voltage battery
- Increased fuel consumption (for hybrids)
Causes
- Open or short circuit in the CAN/LIN bus wiring
- Hybrid battery control module malfunction
- Poor contact or corrosion in connectors
- Blown module power fuse
- Problems with module ground connection
How to Fix
- Check fuses associated with the hybrid system
- Inspect the battery module connectors and wiring for damage.
- Check the condition of the ground and power supply of the module
- Scan the battery module for additional fault codes
- Repair only from an authorized dealer
Related codes
Error U01A3 by Vehicle Brand
FAQ
What does the U01A3 code mean?
U01A3 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Hybrid/EV Battery Interface Control Module D
What causes a U01A3 error code?
The most common causes of U01A3 include: Open or short circuit in the CAN/LIN bus wiring; Hybrid battery control module malfunction; Poor contact or corrosion in connectors; Blown module power fuse.
How do I fix a U01A3 diagnostic trouble code?
To fix U01A3: Check fuses associated with the hybrid system. Inspect the battery module connectors and wiring for damage.. Check the condition of the ground and power supply of the module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U01A3?
Do not drive — repair immediately
How much does it cost to fix U01A3?
The estimated repair cost for U01A3 is $167–889. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat