AutoCodes – Cadillac – P0B8E Cadillac

P0B8E Cadillac Code - Hybrid/Electric Vehicle Battery 17 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: P0B8E Cadillac indicates Hybrid/Electric Vehicle Battery 17 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 925

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B8E 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 P0B8E Cadillac - Hybrid/Electric Vehicle Battery 17 Circuit High Voltage - AutoCodes.com — P0B8E Cadillac Code - Hybrid/Electric Vehicle Battery 17 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0B8E Cadillac?

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

How to Fix the DTC P0B8E 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 P0B8E 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 P0B8E Cadillac Code

1. What are the common symptoms of OBDII code P0B8E in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms include the Check Engine light illuminating, reduced hybrid system performance, and potential drivability issues.

2. What does the OBDII code P0B8E in a Cadillac Hybrid/Electric Vehicle indicate?

- This code specifically points to a high voltage issue in the Hybrid/Electric Vehicle Battery 17 circuit.

3. What are the possible causes of OBDII code P0B8E in a Cadillac Hybrid/Electric Vehicle?

- Potential causes can include a faulty high voltage battery, damaged wiring or connectors in the circuit, or issues with the battery control module.

4. How can I diagnose the OBDII code P0B8E in my Cadillac Hybrid/Electric Vehicle?

- Proper diagnostic procedures involve using a scan tool to read the code, conducting visual inspections of the battery components, and performing voltage tests on the circuit.

5. Can I continue driving my Cadillac with the OBDII code P0B8E present?

- It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the hybrid system components.

6. How can I repair OBDII code P0B8E in my Cadillac Hybrid/Electric Vehicle?

- Repair options may include replacing the high voltage battery, repairing damaged wiring or connectors, or reprogramming the battery control module.

7. Is it safe to attempt repairs on the high voltage components related to OBDII code P0B8E?

- Working on high voltage components requires advanced knowledge and safety precautions, so it is recommended to seek professional assistance for these repairs.

8. Will resetting the Check Engine light make OBDII code P0B8E disappear?

- Resetting the light may temporarily clear the code, but it will likely return if the underlying issue causing the high voltage circuit problem is not resolved.

9. How can I prevent OBDII code P0B8E from occurring in the future in my Cadillac Hybrid/Electric Vehicle?

- Regular maintenance, such as checking the high voltage system components and addressing any issues promptly, can help prevent this code from reoccurring.

10. Are there any recalls or technical service bulletins related to OBDII code P0B8E in Cadillac Hybrid/Electric Vehicles?

- It's recommended to check with a Cadillac dealership or visit the National Highway Traffic Safety Administration (NHTSA) website for any relevant recalls or bulletins regarding this issue.