AutoCodes – Cadillac – U2604 Cadillac

U2604 Cadillac Code - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 2

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Hybrid/EV Battery Interface Control Module 2, Hybrid/EV Battery Interface Control Module 2 harness is open or shorted, Hybrid/EV Battery Interface Control Module 2 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: U2604 Cadillac indicates Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 2.
Common causes: Common causes include Faulty Hybrid/EV Battery Interface Control Module 2, Hybrid/EV Battery Interface Control Module 2 harness is open or shorted, Hybrid/EV Battery Interface Control Module 2 circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 499

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 18, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2604 Cadillac Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device.
The scan tool does not communicate the Hybrid/EV Battery Interface Control Modules 2 on Battery Energy Control Module dedicated bus.
The Diagnostic Trouble Code (DTC) will set when there is no temperature report message from Hybrid/EV Battery Interface Control Modules 2 to Battery Energy Control Module within 4s.

OBDII Code U2604 Cadillac - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 2 - AutoCodes.com — U2604 Cadillac Code - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 2

What does this mean?

What are the Possible Causes of the DTC U2604 Cadillac?

Faulty Hybrid/EV Battery Interface Control Module 2
Hybrid/EV Battery Interface Control Module 2 harness is open or shorted
Hybrid/EV Battery Interface Control Module 2 circuit poor electrical connection
Faulty Battery Energy Control Module

How to Fix the DTC U2604 Cadillac?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U2604 Cadillac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U2604 Cadillac Code

1. What are the common symptoms of OBDII code U2604 in a Cadillac?

- Common symptoms include loss of communication between the Battery Energy Control Module and the Hybrid/EV Battery Interface Control Module 2, which may result in issues with the hybrid or electric powertrain system.

2. What could cause the U2604 code to appear in a Cadillac?

- The U2604 code typically appears when there is a communication error between the Battery Energy Control Module and the Hybrid/EV Battery Interface Control Module 2, which can be caused by wiring issues, faulty modules, or software glitches.

3. How serious is the U2604 code in a Cadillac?

- The U2604 code should be addressed promptly as it can affect the performance and efficiency of the hybrid or electric powertrain system in the Cadillac.

4. Can I continue driving my Cadillac with the U2604 code present?

- It is not recommended to drive the vehicle with the U2604 code present, as it can lead to further complications with the hybrid or electric powertrain system.

5. How can I diagnose the U2604 code in my Cadillac?

- Diagnosing the U2604 code requires a professional OBDII scanner to retrieve the specific error codes and pinpoint the communication issue between the Battery Energy Control Module and the Hybrid/EV Battery Interface Control Module 2.

6. What are some repair tips for fixing the U2604 code in a Cadillac?

- Repair tips may include checking and repairing any damaged wiring, ensuring proper connections between modules, updating software, or replacing faulty modules as needed.

7. Can I fix the U2604 code in my Cadillac on my own?

- While some basic troubleshooting steps can be taken, resolving the U2604 code often requires the expertise of a qualified mechanic or dealership with specialized diagnostic equipment.

8. Are there any recalls related to the U2604 code in Cadillac vehicles?

- It is recommended to check with Cadillac or the National Highway Traffic Safety Administration (NHTSA) for any recalls or service bulletins related to the U2604 code in specific Cadillac models.

9. How much does it typically cost to repair the U2604 code in a Cadillac?

- The cost of repairing the U2604 code can vary depending on the exact cause of the communication issue and the labor rates of the repair facility. It is advisable to obtain quotes from multiple sources before proceeding with repairs.

10. How can I prevent the U2604 code from reoccurring in my Cadillac?

- Regular maintenance, including checking and maintaining the health of the hybrid or electric powertrain components, can help prevent the U2604 code from reoccurring.