U01A2
Lost Communication With Hybrid/EV Battery Interface Control Module C
U01A2 is an OBD-II diagnostic trouble code meaning: Lost Communication With Hybrid/EV Battery Interface Control Module C. Common causes: open or short circuit in can circuit, problems with power supply to the battery management module. Estimated repair cost: $56–222.
Symptoms
- Check Engine light comes on
- The car goes into emergency mode
- Reduced engine power
- Inability to charge the battery
- Errors in the operation of the hybrid system
Causes
- Open or short circuit in CAN circuit
- Problems with power supply to the battery management module
- Battery management module malfunction
- Corrosion or poor contact in connectors
- Software problems
How to Fix
- Check the integrity of the CAN wiring harness
- Check power supply and grounding of the module
- Inspect connectors for corrosion
- Scan other modules for errors
- Repair only from an authorized dealer
Related codes
Error U01A2 by Vehicle Brand
FAQ
What does the U01A2 code mean?
U01A2 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Hybrid/EV Battery Interface Control Module C
What causes a U01A2 error code?
The most common causes of U01A2 include: Open or short circuit in CAN circuit; Problems with power supply to the battery management module; Battery management module malfunction; Corrosion or poor contact in connectors.
How do I fix a U01A2 diagnostic trouble code?
To fix U01A2: Check the integrity of the CAN wiring harness. Check power supply and grounding of the module. Inspect connectors for corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U01A2?
Do not drive — repair immediately
How much does it cost to fix U01A2?
The estimated repair cost for U01A2 is $56–222. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat