AutoCodes – Cadillac – P1B65 Cadillac

P1B65 Cadillac Code - Hybrid/Electric Vehicle Battery 43 Circuit High 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: P1B65 Cadillac indicates Hybrid/Electric Vehicle Battery 43 Circuit High 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 999

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 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B65 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 P1B65 Cadillac - Hybrid/Electric Vehicle Battery 43 Circuit High Voltage - AutoCodes.com — P1B65 Cadillac Code - Hybrid/Electric Vehicle Battery 43 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B65 Cadillac?

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

How to Fix the DTC P1B65 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 P1B65 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 P1B65 Cadillac Code

1. What are common symptoms of OBDII code P1B65 Cadillac Hybrid/Electric Vehicle Battery 43 Circuit High Voltage?

- Common symptoms include the malfunction indicator light (MIL) illuminating, reduced hybrid/electric vehicle performance, and potential drivability issues.

2. What are the possible causes of OBDII code P1B65 Cadillac Hybrid/Electric Vehicle Battery 43 Circuit High Voltage?

- Possible causes may include a faulty high voltage battery, issues with battery temperature sensors, wiring problems, or a malfunctioning battery management system.

3. How can I diagnose OBDII code P1B65 in my Cadillac Hybrid/Electric vehicle?

- Diagnosis typically involves using a scan tool to retrieve the specific code, checking the high voltage battery and related components for damage or loose connections, and testing sensors for proper functionality.

4. Can I continue driving my Cadillac with OBDII code P1B65 present?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the hybrid/electric system and potentially compromise safety.

5. How can I repair OBDII code P1B65 Cadillac Hybrid/Electric Vehicle Battery 43 Circuit High Voltage?

- Repair options may include replacing the high voltage battery, repairing or replacing damaged wiring, ensuring proper sensor function, and resetting the fault code using a scan tool.

6. Are there any safety precautions to consider when dealing with high voltage systems in a Cadillac Hybrid/Electric vehicle?

- Yes, it is important to follow proper safety procedures and guidelines when working on high voltage systems, including disconnecting the power source, wearing insulated gloves and tools, and seeking professional assistance if unsure.

7. Can OBDII code P1B65 be triggered by a simple electrical issue in my Cadillac Hybrid/Electric vehicle?

- Yes, simple electrical issues like loose connections, corroded terminals, or damaged wiring can sometimes trigger this code, so it is important to conduct a thorough inspection.

8. How do I reset the OBDII code P1B65 in my Cadillac Hybrid/Electric vehicle?

- The code can be reset using a scan tool capable of clearing fault codes, but it is recommended to first diagnose and address the underlying issue to prevent the code from reoccurring.

9. Is it possible for OBDII code P1B65 to be a false alarm in my Cadillac Hybrid/Electric vehicle?

- While rare, false alarms can occur, so it is advisable to verify the code with a proper diagnosis before proceeding with any repairs or part replacements.

10. Can a DIY enthusiast with basic automotive knowledge attempt to fix OBDII code P1B65 in a Cadillac Hybrid/Electric vehicle?

- Due to the complex nature of hybrid/electric systems and high voltage components, it is generally recommended to seek assistance from a qualified technician or specialized repair facility for issues related to OBDII code P1B65.