OBD Guide
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U2606

Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 4

U2606 is an OBD-II diagnostic trouble code meaning: Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 4. Common causes: malfunction of battery management interface module no. 4, battery energy management module (becm) malfunction. Estimated repair cost: $56–556.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–556 (est.)

Symptoms

  • Malfunction indicator light (MIL) is on
  • Error message on the dashboard
  • Limited power or performance of the hybrid/electric system
  • Inability to charge battery
  • Incorrect operation of the battery management system

Causes

  • Malfunction of Battery Management Interface Module No. 4
  • Battery Energy Management Module (BECM) malfunction
  • Open or short circuit in the wiring between modules
  • Problems with connectors (corrosion, loose contacts)
  • CAN data bus problems

How to Fix

  1. Check the wiring and connectors between the Battery Energy Management Module and the No. 4 Battery Management Interface Module for damage or corrosion.
  2. Check the voltage and integrity of the power and grounding circuits of both modules.
  3. Check communication between modules using a diagnostic scanner.
  4. Check the resistance of the CAN bus.
  5. Replace the faulty module (Battery Management Interface Module #4 or Battery Energy Management Module) as necessary.

Related codes

U2600U2601U2602U2603

FAQ

What does the U2606 code mean?

U2606 is an OBD-II diagnostic trouble code that indicates: Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 4

What causes a U2606 error code?

The most common causes of U2606 include: Malfunction of Battery Management Interface Module No. 4; Battery Energy Management Module (BECM) malfunction; Open or short circuit in the wiring between modules; Problems with connectors (corrosion, loose contacts).

How do I fix a U2606 diagnostic trouble code?

To fix U2606: Check the wiring and connectors between the Battery Energy Management Module and the No. 4 Battery Management Interface Module for damage or corrosion.. Check the voltage and integrity of the power and grounding circuits of both modules.. Check communication between modules using a diagnostic scanner.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U2606?

Yes, but get it checked soon

How much does it cost to fix U2606?

The estimated repair cost for U2606 is $56–556. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat