U0112

Lost Communication With Battery Energy Control Module B

Severity

🔴 High

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Switching to emergency mode
Battery charging problems
Inability to use electric mode (for hybrids)

Causes

Open or short circuit in wiring harness
Battery Energy Management Module B malfunction
Connector problems or contact corrosion
CAN bus fault
Software errors in the ECU

How to Fix

Check the integrity of the wiring harness to the module
Inspect and clean electrical connectors
Check power supply and grounding of the module
Scan the CAN bus for errors
Update ECU software if necessary
Repair only from an authorized dealer

Related codes

U0111 U0113 U0114