AutoCodes – Generic – P3044

P3044 Code - Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit High Voltage

Quick Answer

The hybrid battery contains 192 individual cells. Common causes include Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted, Hybrid/EV Battery Interface Control Module 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: P3044 indicates Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit High Voltage.
Common causes: Common causes include Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted, Hybrid/EV Battery Interface Control Module 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 3,570

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 May 16, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P3044 Description

The hybrid battery contains 192 individual cells. Two cells are welded together in parallel and called a cell group. There are a total of 96 cell groups in the hybrid battery assembly. These cell groups are electrically connected in series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V direct current. The battery cell groups are joined to form 3 distinct sections. The first 24 battery cell groups make up battery section 1. This section is adjacent to the cowl and contains battery cell groups 73 through 96. The next 28 battery cell groups make up battery section 2. This section is located behind section 1 and contains battery cell groups 45 through 72. The transverse battery section is section number 3 and it contains the remaining 44 battery cell groups 1 through 44. The battery sections also contain two temperature sensors, with one sensor located at each end of the section.
The battery energy control module monitors the voltage of the 96 battery cell groups. The voltage sense lines are attached to each individual cell group, and these sense lines terminate at a connector located on the top surface of the battery section. A voltage sense harness joins this connector to the battery energy control module.
The battery energy control module contains internal interface control modules that monitor specific cell groups.
The battery energy control module will determine when a fault condition is present. Diagnostics and system status are communicated from the battery energy control module to the hybrid powertrain control module 2 through serial data. The hybrid powertrain control module 2 is the host controller for diagnostic trouble code information.

OBDII Code P3044 - Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit High Voltage - AutoCodes.com — P3044 Code - Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P3044?

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

How to Fix the DTC P3044?

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 P3044 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.

Need more information about the P3044 code?

Need more information on how to fix the P3044 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P3044 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P3044 Buick — Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit High Voltage
P3044 Cadillac — Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit High Voltage
P3044 Chevrolet — Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit High Voltage
P3044 GMC — Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit High Voltage
P3044 Saturn — Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit High Voltage

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 P3044 Code

What does the OBDII code P3044 mean?

P3044 refers to a high voltage condition detected in the 12-volt sensor circuit of the Hybrid/EV Battery Interface Control Module, indicating potential issues with the battery management system.

What are the common symptoms associated with code P3044?

Common symptoms include warning lights on the dashboard, reduced engine power, erratic battery performance, and possible failure to start.

What could cause the P3044 code to trigger?

Causes may include a faulty 12-volt battery, damaged wiring or connectors, a malfunctioning battery interface control module, or issues within the battery itself.

How can I diagnose the P3044 code?

Start by using an OBDII scanner to confirm the code. Inspect the wiring and connectors for damage, test the 12-volt battery voltage, and check the operation of the battery interface control module.

What is the first step in repairing the P3044 code?

The first step is to visually inspect the wiring and connectors associated with the Hybrid/EV Battery Interface Control Module for any signs of damage or corrosion.

Can I drive my vehicle if the P3044 code is present?

It is not advisable to drive the vehicle if the P3044 code is present, as it may lead to reduced performance or further battery issues.

What repairs are typically needed for code P3044?

Repairs may involve replacing a faulty 12-volt battery, repairing or replacing damaged wiring or connectors, or, in some cases, replacing the battery interface control module.

How can I prevent the P3044 code from occurring in the future?

Regular maintenance of the vehicle's battery system, including checking the battery health and ensuring clean and secure connections, can help prevent the P3044 code from occurring.

Is code P3044 serious and should I seek professional help?

Yes, P3044 can be serious as it relates to the vehicle's hybrid or electric battery management system. It is recommended to seek professional help to diagnose and repair the issue properly.