AutoCodes – Generic – P3043

P3043 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 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 11,134

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 20, 2020

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

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?

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 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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Information for Specific Makes

P3043 Audi — Fuel Pump Mechanical Malfunction
P3043 Buick — Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Low Voltage
P3043 Cadillac — Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Low Voltage
P3043 Chevrolet — Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Low Voltage
P3043 GMC — Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Low Voltage
P3043 Saturn — Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Low Voltage
P3043 Volkswagen — Fuel Pump Mechanical Malfunction

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 Code

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

- Common symptoms include reduced hybrid/EV system performance, decreased fuel efficiency, and potential illumination of the check engine light.

2. What are the possible causes of OBDII code P3043 indicating a low voltage issue with the Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit?

- Possible causes include a faulty battery interface control module, damaged wiring or connectors, low voltage in the hybrid/EV battery system, or a malfunctioning voltage sensor.

3. How can I diagnose the root cause of OBDII code P3043 in relation to the Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Low Voltage?

- Diagnosis typically involves conducting a thorough inspection of the battery interface control module, checking the voltage sensor and related wiring for damage, and testing the hybrid/EV battery voltage levels.

4. What are some repair tips for addressing OBDII code P3043 associated with the Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Low Voltage?

- Repair tips may include replacing the faulty battery interface control module, repairing or replacing damaged wiring/connectors, ensuring proper voltage levels in the hybrid/EV battery system, and calibrating the voltage sensor.

5. Can driving with OBDII code P3043 present cause further damage to the vehicle?

- Continuing to drive with this code present can potentially lead to reduced hybrid/EV system efficiency, decreased battery performance, and may cause additional strain on the electrical components.

6. Is it safe to drive my vehicle with OBDII code P3043 if I notice no significant symptoms?

- It is generally not recommended to drive the vehicle with this code present, as it can impact the overall performance and efficiency of the hybrid/EV system, even if noticeable symptoms are not present.

7. How much can I expect to pay for repairs related to OBDII code P3043 and the Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Low Voltage?

- Repair costs can vary depending on the exact cause of the issue, but expect to pay anywhere from $200 to $800 for parts and labor, including potential diagnostic fees.

8. Are there any preventative measures I can take to avoid encountering OBDII code P3043 in the future?

- Regularly maintaining the hybrid/EV battery system, checking for any signs of wear or damage, and addressing any related warning lights or symptoms promptly can help prevent issues leading to this code.