AutoCodes – GMC – P0B65 GMC

P0B65 GMC Code - Hybrid/Electric Vehicle Battery 9 Circuit Low Voltage

Quick Answer

The Hybrid/Electric Vehicle battery pack contains 288 cells. Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module. 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: P0B65 GMC indicates Hybrid/Electric Vehicle Battery 9 Circuit Low Voltage.
Common causes: Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module.
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 976

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 Mar 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B65 GMC Description

The Hybrid/Electric Vehicle battery pack contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 cell groups in the hybrid/EV battery pack 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 cells are also grouped together into three sections. The first 90 cells/30 cell groups make up battery section one. This section is adjacent to the cowl and contains batteries 67 through to 96. Battery section two is located behind section one. It is made up of 72 cells/24 cell groups and contains batteries 43 through to 66. The transverse battery section is section number three, it is made up of the remaining 126 cells/42 cell groups and contains batteries 1 through to 42. The three battery sections are individually serviceable components.
The battery energy control module monitors the voltage of the 96 battery cell groups through the four hybrid/EV battery interface control modules. Voltage sense circuits are attached to each individual cell group, and these sense circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness joins this connector to a hybrid/EV battery interface control module, also located on the top surface of the battery section. The hybrid/EV battery interface control module encodes the voltage reading and transmits it to the battery energy control module through the battery control harness. There is one hybrid/EV battery interface control module located on battery sections one and two, and two hybrid/EV battery interface control modules associated with battery section three. The hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module are all considered serviceable components.
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 hybrid/EV powertrain control module 2 through serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.

OBDII Code P0B65 GMC - Hybrid/Electric Vehicle Battery 9 Circuit Low Voltage - AutoCodes.com — P0B65 GMC Code - Hybrid/Electric Vehicle Battery 9 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0B65 GMC?

Faulty Hybrid/Electric Vehicle Battery Pack
Faulty Hybrid/Electric Vehicle Battery Interface Control Module

How to Fix the DTC P0B65 GMC?

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 P0B65 GMC 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 P0B65 GMC Code

1. What are the common symptoms of OBDII code P0B65 in a GMC hybrid/electric vehicle?

- Common symptoms include reduced power or performance, difficulty starting the vehicle, and the illumination of the hybrid/electric system warning light.

2. What are the possible causes of OBDII code P0B65 indicating Hybrid/Electric Vehicle Battery 9 Circuit Low Voltage in a GMC?

- Possible causes include a faulty hybrid/electric battery, issues with the battery management system, damaged wiring, or a malfunctioning battery sensor.

3. How can I diagnose OBDII code P0B65 in my GMC hybrid/electric vehicle?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific code, checking the battery voltage levels, inspecting the battery connections, and testing the battery health using specialized equipment.

4. What are the potential risks of driving with OBDII code P0B65 in a GMC hybrid/electric vehicle?

- Continuing to drive with this code can lead to further damage to the hybrid/electric system, reduced fuel efficiency, and potential safety hazards due to power loss while driving.

5. Can I repair OBDII code P0B65 in my GMC hybrid/electric vehicle myself?

- Repairing this code often requires specialized knowledge and equipment, so it is recommended to seek assistance from a certified technician or a dealership familiar with hybrid/electric vehicle systems.

6. How much does it typically cost to fix OBDII code P0B65 related to the Hybrid/Electric Vehicle Battery 9 Circuit Low Voltage in a GMC?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing the hybrid/electric battery, repairing wiring, or recalibrating the battery management system, potentially costing several hundred to a few thousand dollars.

7. Are there any preventive maintenance tips to avoid OBDII code P0B65 in a GMC hybrid/electric vehicle?

- Regularly inspecting the hybrid/electric battery, following the manufacturer's maintenance schedule, and avoiding deep discharges of the battery can help prevent issues leading to this code.

8. Can a weak or failing 12-volt battery cause OBDII code P0B65 in a GMC hybrid/electric vehicle?

- Yes, a weak or failing 12-volt battery can impact the voltage levels in the hybrid/electric system, potentially triggering the P0B65 code. It is advisable to check and replace the 12-volt battery if necessary.

9. How long does it take to repair OBDII code P0B65 related to the Hybrid/Electric Vehicle Battery 9 Circuit Low Voltage in a GMC?

- The repair time can vary depending on the exact cause and complexity of the issue, but it may take a few hours to a day for a qualified technician to diagnose and repair the problem.