U2603
Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 1
U2603 is an OBD-II diagnostic trouble code meaning: Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 1. Common causes: broken or damaged wires in the can bus, battery energy management module malfunction. Estimated repair cost: $167–556.
Symptoms
- Check Engine light comes on
- Reduced vehicle power
- Switching to emergency mode
- Battery charging problems
- Unstable operation of the hybrid system
Causes
- Broken or damaged wires in the CAN bus
- Battery Energy Management Module Malfunction
- Battery Interface Module Fault
- Problems with module power supply
- Contact corrosion
How to Fix
- Check the integrity of the CAN bus wiring
- Check power supply and grounding of modules
- Diagnose the battery energy management module
- Diagnose the battery interface module
- Repair only from an authorized dealer
Related codes
FAQ
What does the U2603 code mean?
U2603 is an OBD-II diagnostic trouble code that indicates: Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 1
What causes a U2603 error code?
The most common causes of U2603 include: Broken or damaged wires in the CAN bus; Battery Energy Management Module Malfunction; Battery Interface Module Fault; Problems with module power supply.
How do I fix a U2603 diagnostic trouble code?
To fix U2603: Check the integrity of the CAN bus wiring. Check power supply and grounding of modules. Diagnose the battery energy management module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U2603?
Do not drive — repair immediately
How much does it cost to fix U2603?
The estimated repair cost for U2603 is $167–556. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat