AutoCodes – Cadillac – P1B82 Cadillac

P1B82 Cadillac Code - Hybrid/Electric Vehicle Battery 53 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: P1B82 Cadillac indicates Hybrid/Electric Vehicle Battery 53 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 818

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 P1B82 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 P1B82 Cadillac - Hybrid/Electric Vehicle Battery 53 Circuit Low Voltage - AutoCodes.com — P1B82 Cadillac Code - Hybrid/Electric Vehicle Battery 53 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B82 Cadillac?

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

How to Fix the DTC P1B82 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 P1B82 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 P1B82 Cadillac Code

1. What are the common symptoms of OBDII code P1B82 in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and warning lights on the dashboard related to the hybrid battery system.

2. What can cause the OBDII code P1B82 in a Cadillac Hybrid/Electric Vehicle?

- The code P1B82 is typically triggered by a low voltage condition in the Hybrid/Electric Vehicle Battery 53 circuit, which can be caused by a faulty battery cell, a damaged battery module, or issues with the battery management system.

3. How serious is the OBDII code P1B82 in a Cadillac Hybrid/Electric Vehicle?

- The code P1B82 indicates a low voltage condition in the hybrid/electric vehicle battery, which can lead to performance issues and potentially affect the vehicle's drivability. It is recommended to address this issue promptly to avoid further damage.

4. Can I continue driving my Cadillac with the OBDII code P1B82 present?

- While it may be possible to continue driving the vehicle with the code present, it is not recommended as it can lead to further damage to the hybrid/electric vehicle battery system. It is best to have the issue diagnosed and repaired by a qualified technician.

5. What are some repair tips for fixing the OBDII code P1B82 in a Cadillac Hybrid/Electric Vehicle?

- Repair tips may include checking the battery connections, inspecting the battery modules for damage, testing the battery cells, and resetting the battery management system. It is advisable to consult the vehicle's service manual or seek professional help for accurate diagnosis and repair.

6. How can I prevent the OBDII code P1B82 from recurring in my Cadillac Hybrid/Electric Vehicle?

- To prevent the code P1B82 from recurring, it is important to maintain the hybrid/electric vehicle battery system properly by following the manufacturer's recommended maintenance schedule, avoiding deep discharges, and ensuring the battery connections are secure.

7. Is it safe to attempt DIY repairs for the OBDII code P1B82 in a Cadillac Hybrid/Electric Vehicle?

- Due to the complexity of hybrid/electric vehicle battery systems and the potential risks involved, it is recommended to seek the assistance of a qualified technician or a dealership specializing in hybrid/electric vehicle repairs for diagnosing and repairing the code P1B82.

8. Will resetting the OBDII code P1B82 clear the issue in a Cadillac Hybrid/Electric Vehicle?

- Resetting the code P1B82 may temporarily clear the warning light, but it will not address the underlying issue causing the low voltage condition in the hybrid/electric vehicle battery. It is important to diagnose and repair the root cause of the problem to prevent recurrence.

9. How much does it cost to repair the OBDII code P1B82 in a Cadillac Hybrid/Electric Vehicle?

- The cost of repairing the OBDII code P1B82 can vary depending on the extent of the issue, the parts needed for repair, and the labor costs charged by the repair facility. It is recommended to obtain a diagnosis and repair estimate from a qualified technician.

10. Can the OBDII code P1B82 in a Cadillac Hybrid/Electric Vehicle be related to other hybrid system faults?

- While the code P1B82 specifically indicates a low voltage condition in the Hybrid/Electric Vehicle Battery 53 circuit, it is possible that other faults in the hybrid system could contribute to or be related to this issue. A comprehensive diagnosis is recommended to address all potential concerns.