U2621
Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 9
U2621 is an OBD-II diagnostic trouble code meaning: Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 9. Common causes: broken or damaged wires in the communication circuit, battery energy management module malfunction. Estimated repair cost: $56–222.
Symptoms
- Check Engine light comes on
- Reduced performance of the hybrid system
- Battery charging problems
- Unstable car operation
- Errors in the diagnostic system
Causes
- Broken or damaged wires in the communication circuit
- Battery Energy Management Module Malfunction
- Battery management interface malfunction
- Problems with module power supply
- Corrosion of contacts or connectors
How to Fix
- Check the integrity of the wiring harness between the modules
- Check contacts and connectors for corrosion
- Check power supply of modules
- Scan modules for additional errors
- Replace the faulty module if necessary
Related codes
FAQ
What does the U2621 code mean?
U2621 is an OBD-II diagnostic trouble code that indicates: Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 9
What causes a U2621 error code?
The most common causes of U2621 include: Broken or damaged wires in the communication circuit; Battery Energy Management Module Malfunction; Battery management interface malfunction; Problems with module power supply.
How do I fix a U2621 diagnostic trouble code?
To fix U2621: Check the integrity of the wiring harness between the modules. Check contacts and connectors for corrosion. Check power supply of modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U2621?
Yes, but get it checked soon
How much does it cost to fix U2621?
The estimated repair cost for U2621 is $56–222. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat