AutoCodes – Generic – P3038

P3038 Code - Hybrid/EV Battery Interface Control Module 11 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: P3038 indicates Hybrid/EV Battery Interface Control Module 11 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 3,701

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 P3038 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 P3038 - Hybrid/EV Battery Interface Control Module 11 Voltage Sensor Circuit Low Voltage - AutoCodes.com — P3038 Code - Hybrid/EV Battery Interface Control Module 11 Voltage Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P3038?

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 P3038?

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 P3038 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 P3038 code?

Need more information on how to fix the P3038 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P3038 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P3038 Buick — Hybrid/EV Battery Interface Control Module 11 Voltage Sensor Circuit Low Voltage
P3038 Cadillac — Hybrid/EV Battery Interface Control Module 11 Voltage Sensor Circuit Low Voltage
P3038 Chevrolet — Hybrid/EV Battery Interface Control Module 11 Voltage Sensor Circuit Low Voltage
P3038 GMC — Hybrid/EV Battery Interface Control Module 11 Voltage Sensor Circuit Low Voltage
P3038 Saturn — Hybrid/EV Battery Interface Control Module 11 Voltage Sensor Circuit Low 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 P3038 Code

1. What are common symptoms of OBDII code P3038 related to the Hybrid/EV Battery Interface Control Module 11 Voltage Sensor Circuit Low Voltage?

- Common symptoms include poor fuel economy, decreased power, illuminated check engine light, and potential drivability issues.

2. What are possible causes of OBDII code P3038 indicating Hybrid/EV Battery Interface Control Module 11 Voltage Sensor Circuit Low Voltage?

- Potential causes may include a faulty battery voltage sensor, damaged wiring or connectors, low battery voltage, or issues with the hybrid/EV battery interface control module.

3. How can I diagnose the OBDII code P3038 related to the Hybrid/EV Battery Interface Control Module 11 Voltage Sensor Circuit Low Voltage?

- Diagnosis typically involves using a scan tool to retrieve the code, checking the battery voltage sensor and related components for damage, and conducting a thorough inspection of the wiring and connectors.

4. Is it safe to continue driving with OBDII code P3038 present?

- It is not recommended to continue driving with this code present, as it can lead to potential performance issues and further damage to the hybrid/EV system.

5. Can I repair OBDII code P3038 related to the Hybrid/EV Battery Interface Control Module 11 Voltage Sensor Circuit Low Voltage myself?

- While some DIY enthusiasts may attempt to address this issue, it is recommended to seek professional help due to the complexity of hybrid/EV systems and potential safety hazards.

6. Are there any specific repair tips for addressing OBDII code P3038?

- When repairing this code, it is crucial to follow manufacturer guidelines, use quality replacement parts, and ensure proper diagnosis to avoid misdiagnosis and unnecessary repairs.

7. How much does it typically cost to repair OBDII code P3038 associated with the Hybrid/EV Battery Interface Control Module 11 Voltage Sensor Circuit Low Voltage?

- Repair costs can vary depending on the extent of the issue, location, labor rates, and parts required. It is advisable to obtain quotes from reputable repair shops.

8. What are the long-term effects of ignoring OBDII code P3038 related to the Hybrid/EV Battery Interface Control Module 11 Voltage Sensor Circuit Low Voltage?

- Ignoring this code can potentially lead to reduced fuel efficiency, drivability problems, and further damage to the hybrid/EV system components, resulting in more expensive repairs.

9. Can a reset of the OBDII system clear the P3038 code temporarily?

- A reset may temporarily clear the code, but if the underlying issue causing the code is not addressed, it is likely to reappear once the vehicle is driven and the system performs self-tests.

10. Is there a recall or warranty coverage for OBDII code P3038 associated with the Hybrid/EV Battery Interface Control Module 11 Voltage Sensor Circuit Low Voltage?

- It is advisable to check with the vehicle manufacturer or authorized dealerships to inquire about any recalls or warranty coverage pertaining to this specific OBDII code.