AutoCodes – Buick – P3035 Buick

P3035 Buick Code - Hybrid/EV Battery Interface Control Module 11 5 V Reference Circuit

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: P3035 Buick indicates Hybrid/EV Battery Interface Control Module 11 5 V Reference Circuit.
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 996

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 P3035 Buick 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 P3035 Buick - Hybrid/EV Battery Interface Control Module 11 5 V Reference Circuit - AutoCodes.com — P3035 Buick Code - Hybrid/EV Battery Interface Control Module 11 5 V Reference Circuit

What does this mean?

What are the Possible Causes of the DTC P3035 Buick?

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 P3035 Buick?

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 P3035 Buick 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 P3035 Buick Code

1. What does the OBDII code P3035 mean on a Buick?

P3035 indicates an issue with the Hybrid/EV Battery Interface Control Module 11's 5V reference circuit, which may affect the vehicle's ability to properly monitor or control the hybrid/EV battery system.

2. What are the common symptoms of code P3035?

Common symptoms include a check engine light, reduced hybrid/EV system performance, limited power output, or the vehicle entering a limp mode.

3. What causes the P3035 code to appear on a Buick?

This code can be caused by a faulty Hybrid/EV Battery Interface Control Module, damaged wiring or connectors in the 5V reference circuit, or a short or open circuit in the system.

4. Can driving with code P3035 damage my Buick?

Yes, driving with this code could potentially damage the hybrid/EV battery system or lead to further complications if left unresolved.

5. How do I diagnose the P3035 code?

Diagnose the code by using a scan tool to confirm the fault, inspecting the 5V reference circuit wiring and connectors for damage, and testing the Hybrid/EV Battery Interface Control Module for proper operation.

6. Is the P3035 code specific to Buicks with hybrid or EV systems?

Yes, this code is specific to Buick models equipped with hybrid or electric vehicle (EV) systems that utilize a Hybrid/EV Battery Interface Control Module.

7. What repairs can fix the P3035 code?

Repairs may include replacing damaged wiring or connectors, repairing a short or open circuit, or replacing the Hybrid/EV Battery Interface Control Module if it is faulty.

8. How much does it cost to repair the P3035 code on a Buick?

The repair cost depends on the specific issue, but module replacement can range from $500 to $1,500 or more, while wiring repairs are typically less expensive.

9. Can I fix the P3035 code myself?

If you have experience with automotive electrical systems and the proper tools, you may be able to repair wiring or connectors. However, module replacement and reprogramming are best left to professionals.

10. Does the P3035 code require reprogramming after repairs?

If the Hybrid/EV Battery Interface Control Module is replaced, it may require reprogramming using specialized equipment to ensure proper operation.