AutoCodes – Cadillac – P3044 Cadillac

P3044 Cadillac 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 Cadillac 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 942

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

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 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 P3044 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 P3044 Cadillac Code

What does the OBDII code P3044 mean on a Cadillac?

1. The P3044 code indicates a high voltage issue in the Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit, meaning the sensor is detecting an abnormally high voltage reading. 2.

What are the common symptoms of code P3044 in a Cadillac?

Common symptoms include the check engine light turning on, reduced fuel efficiency, limited hybrid/EV functionality, or the vehicle entering limp mode. 3.

What causes the P3044 code to appear?

Potential causes include a faulty hybrid/EV battery voltage sensor, damaged wiring or connectors in the voltage sensor circuit, or a malfunctioning hybrid/EV battery interface control module. 4.

Can a loose connection trigger the P3044 code?

Yes, loose or corroded connections in the wiring harness related to the voltage sensor circuit can trigger this code. 5.

Is it safe to drive a Cadillac with the P3044 code?

Driving with this code may not be safe, as it could indicate issues with the hybrid/EV system that might lead to reduced performance or further damage. 6.

How can I diagnose the P3044 code on my Cadillac?

Diagnosis involves checking for damaged wiring, inspecting the voltage sensor, and testing the hybrid/EV battery interface control module for proper operation. 7.

What repairs can fix the P3044 code on a Cadillac?

Repairs may include replacing the voltage sensor, repairing damaged wiring or connectors, or replacing the hybrid/EV battery interface control module if necessary. 8.

How much does it cost to fix code P3044 on a Cadillac?

Repair costs vary but can range from $200 to $1,500, depending on whether the issue is with wiring, the voltage sensor, or the control module. 9.

Can a software update fix the P3044 code?

In some cases, a software update to the hybrid/EV battery interface control module may resolve the issue if itâ€™s related to a programming error. 10.

How can I prevent the P3044 code from returning?

Regular maintenance, inspecting the hybrid/EV system's wiring and components, and addressing minor electrical issues promptly can help prevent this code from recurring.