U2604
Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 2
U2604 is an OBD-II diagnostic trouble code meaning: Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 2. Common causes: open or short circuit in the communication circuit, battery energy management module malfunction. Estimated repair cost: $56–222.
Symptoms
- Check Engine light comes on
- Reduced vehicle power
- Battery charging problems
- Incorrect charge level display
- The car goes into emergency mode
Causes
- Open or short circuit in the communication circuit
- Battery Energy Management Module Malfunction
- Problems with Battery Management Interface Module 2
- Poor contact in connectors
- Problems with module power supply
How to Fix
- Check the integrity of the wiring harness between the modules
- Check connections and connectors for corrosion or damage
- Check power supply of modules
- Scan other modules for errors
- Replace the faulty module if necessary
Related codes
FAQ
What does the U2604 code mean?
U2604 is an OBD-II diagnostic trouble code that indicates: Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 2
What causes a U2604 error code?
The most common causes of U2604 include: Open or short circuit in the communication circuit; Battery Energy Management Module Malfunction; Problems with Battery Management Interface Module 2; Poor contact in connectors.
How do I fix a U2604 diagnostic trouble code?
To fix U2604: Check the integrity of the wiring harness between the modules. Check connections and connectors for corrosion or damage. Check power supply of modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U2604?
Do not drive — repair immediately
How much does it cost to fix U2604?
The estimated repair cost for U2604 is $56–222. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat