AutoCodes – Cadillac – P0B65 Cadillac

P0B65 Cadillac 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 Cadillac 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 850

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

What does this mean?

What are the Possible Causes of the DTC P0B65 Cadillac?

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

How to Fix the DTC P0B65 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 P0B65 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 P0B65 Cadillac Code

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

- Common symptoms include reduced electric vehicle range, poor fuel efficiency, and possible warning lights on the dashboard related to the hybrid/electric system.

2. What could cause the OBDII code P0B65 "Hybrid/Electric Vehicle Battery 9 Circuit Low Voltage" in a Cadillac?

- This code can be triggered by issues such as a weak or failing hybrid/electric vehicle battery, faulty battery management system, corroded electrical connections, or a problem with the battery sensor.

3. How serious is the OBDII code P0B65 in a Cadillac hybrid/electric vehicle?

- This code indicates a low voltage issue in the hybrid/electric vehicle battery circuit, which can lead to reduced performance and efficiency. It is important to address this issue promptly to prevent further damage to the battery system.

4. Can I continue driving my Cadillac with the OBDII code P0B65 present?

- It is not recommended to continue driving your Cadillac with this code present, as it can impact the performance and efficiency of the hybrid/electric system. It is best to have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose and repair the OBDII code P0B65 in my Cadillac?

- Diagnosing and repairing this code typically requires specialized diagnostic equipment and knowledge of hybrid/electric vehicle systems. It is recommended to take your Cadillac to a certified hybrid/electric vehicle technician for proper diagnosis and repair.

6. Are there any DIY tips for addressing the OBDII code P0B65 in a Cadillac?

- DIY repairs for this code are not recommended due to the complexity of hybrid/electric vehicle systems. It is best to consult a professional technician with experience in hybrid/electric vehicle diagnostics and repairs.

7. How much does it cost to repair the OBDII code P0B65 in a Cadillac?

- The cost of repairing this code can vary depending on the underlying cause of the issue. Repairs may involve replacing the hybrid/electric battery, repairing electrical connections, or resetting the battery management system. It is recommended to obtain a diagnosis and repair estimate from a qualified technician.

8. Can the OBDII code P0B65 be a recurring issue in a Cadillac hybrid/electric vehicle?

- If the underlying cause of the low voltage issue is not properly addressed, the OBDII code P0B65 may reoccur. It is important to address the root cause of the problem to prevent it from happening again in the future.

9. Will resetting the OBDII code P0B65 clear the issue in a Cadillac?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the low voltage in the hybrid/electric vehicle battery circuit. It is essential to diagnose and repair the root cause of the problem.