AutoCodes – GMC – P3044 GMC

P3044 GMC 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 GMC 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 1,120

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

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 GMC?

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 GMC 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 P3044 GMC Code

1. What does the OBDII code P3044 mean on a GMC vehicle?

The code P3044 indicates that the Hybrid/EV Battery Interface Control Module 12 has detected a high voltage issue in the voltage sensor circuit.

2. What are common symptoms of the P3044 code in a GMC vehicle?

Symptoms may include an illuminated check engine light, reduced hybrid/EV system performance, decreased fuel efficiency, and limited electric driving range.

3. What causes the P3044 code to appear in a GMC vehicle?

Common causes include a faulty voltage sensor, damaged wiring or connectors in the circuit, a malfunctioning Hybrid/EV Battery Interface Control Module, or issues with the hybrid/EV battery itself.

4. How can I diagnose the P3044 code on my GMC vehicle?

Diagnose the code by using an OBDII scanner to confirm the code, inspecting wiring and connectors for damage, testing the voltage sensor, and checking the hybrid/EV battery interface control module for faults.

5. Can I drive my GMC vehicle with the P3044 code active?

Driving with the P3044 code is not recommended, as it may lead to reduced performance, potential damage to the hybrid/EV system, or unsafe driving conditions.

6. How do I fix the P3044 code on a GMC vehicle?

Repairs may involve replacing the faulty voltage sensor, repairing damaged wiring or connectors, reprogramming or replacing the Hybrid/EV Battery Interface Control Module, or addressing hybrid/EV battery issues.

7. Is the P3044 code specific to GMC vehicles?

While the P3044 code is commonly associated with GMC vehicles, it can appear on other makes and models equipped with hybrid/EV systems that utilize similar voltage sensor circuits.

8. What tools are needed to troubleshoot the P3044 code on a GMC?

A diagnostic scan tool, multimeter, and possibly a service manual for the specific vehicle model are essential for troubleshooting the P3044 code.

9. How much does it cost to repair the P3044 code on a GMC vehicle?

Repair costs can vary widely depending on the root cause, ranging from $100 for minor wiring repairs to over $1,000 for module or hybrid/EV battery replacement.

10. Can a software update fix the P3044 code on a GMC vehicle?

In some cases, a software update for the Hybrid/EV Battery Interface Control Module may resolve the issue if itâ€™s caused by incorrect programming or a known glitch.