AutoCodes – Cadillac – P3043 Cadillac

P3043 Cadillac Code - Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Low 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: P3043 Cadillac indicates Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Low 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 1,037

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 Apr 27, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P3043 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 P3043 Cadillac - Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Low Voltage - AutoCodes.com — P3043 Cadillac Code - Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P3043 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 P3043 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 P3043 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 P3043 Cadillac Code

1. What are the common symptoms of OBDII code P3043 in a Cadillac with Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Low Voltage?

- Common symptoms include poor fuel efficiency, engine misfires, hesitation during acceleration, and illumination of the check engine light.

2. What are the possible causes of the Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Low Voltage issue in a Cadillac?

- Possible causes include a faulty voltage sensor, damaged wiring or connectors, low battery voltage, or issues with the hybrid/EV battery system.

3. How can I diagnose the P3043 code related to the Hybrid/EV Battery Interface Control Module in my Cadillac?

- Diagnosis involves using an OBDII scanner to retrieve the code, checking the voltage sensor readings, inspecting wiring and connectors for damage, and testing the battery voltage.

4. Can I drive my Cadillac with the P3043 code indicating a low voltage sensor circuit issue?

- It is not recommended to drive the vehicle with this issue as it can lead to further damage to the hybrid/EV battery system and potentially affect the overall performance of the vehicle.

5. How can I repair the Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Low Voltage problem in my Cadillac?

- Repair involves replacing the faulty voltage sensor, repairing or replacing damaged wiring or connectors, ensuring proper battery voltage, and clearing the trouble code.

6. Is it possible to reset the OBDII code P3043 in a Cadillac without fixing the underlying issue?

- While you can clear the code temporarily, it is important to address the root cause of the problem to prevent further issues with the Hybrid/EV battery system.

7. Are there any safety precautions to consider when working on the Hybrid/EV Battery Interface Control Module in a Cadillac?

- It is crucial to disconnect the hybrid/EV battery system properly, follow manufacturer's guidelines, and ensure proper insulation and grounding to prevent electrical hazards.

8. What are the long-term implications of ignoring the P3043 code in a Cadillac with Hybrid/EV Battery issues?

- Ignoring the code can lead to reduced fuel efficiency, engine performance issues, potential damage to the hybrid/EV battery system, and increased risk of breakdowns.

9. Can a DIY enthusiast with automotive knowledge repair the Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit issue in a Cadillac?

- While some repairs may be possible for experienced DIY enthusiasts, it is recommended to consult a professional technician or dealership for proper diagnosis and repair of hybrid/EV systems.

10. How can regular maintenance help prevent issues like P3043 in a Cadillac with a Hybrid/EV Battery Interface Control Module?

- Regular maintenance, including battery inspections, electrical system checks, and timely repairs, can help prevent issues related to the Hybrid/EV Battery Interface Control Module and ensure optimal vehicle performance.