AutoCodes – Cadillac – P0B89 Cadillac

P0B89 Cadillac Code - Hybrid/Electric Vehicle Battery 16 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: P0B89 Cadillac indicates Hybrid/Electric Vehicle Battery 16 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 1,003

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 P0B89 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 P0B89 Cadillac - Hybrid/Electric Vehicle Battery 16 Circuit High Voltage - AutoCodes.com — P0B89 Cadillac Code - Hybrid/Electric Vehicle Battery 16 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0B89 Cadillac?

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

How to Fix the DTC P0B89 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 P0B89 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 P0B89 Cadillac Code

1. What are common symptoms of the OBDII code P0B89 on a Cadillac Hybrid/Electric Vehicle?

- Common symptoms include the check engine light illuminating, reduced fuel efficiency, and potential difficulty starting the vehicle.

2. What can cause the OBDII code P0B89 on a Cadillac Hybrid/Electric Vehicle?

- This code is typically triggered by a high voltage reading in the Hybrid/Electric Vehicle Battery 16 Circuit, often due to issues with the battery pack or related components.

3. How serious is the OBDII code P0B89 on a Cadillac Hybrid/Electric Vehicle?

- This code should be addressed promptly as it can affect the performance and efficiency of the vehicle. Continued driving with this issue unresolved may lead to further damage.

4. Can I continue driving my Cadillac with the OBDII code P0B89 present?

- It is not recommended to continue driving the vehicle with this code present, as it can impact the vehicle's operation and potentially cause more severe issues.

5. How can I diagnose the OBDII code P0B89 on my Cadillac Hybrid/Electric Vehicle?

- Proper diagnosis typically involves using a professional OBDII scanner to read the code and then further inspecting the Hybrid/Electric Vehicle Battery 16 Circuit for any visible damage or loose connections.

6. What are some repair tips for fixing the OBDII code P0B89 on a Cadillac Hybrid/Electric Vehicle?

- Repair may involve checking and tightening battery connections, inspecting the battery pack for damages, and potentially replacing faulty components to resolve the high voltage issue.

7. Can I reset the OBDII code P0B89 on my Cadillac Hybrid/Electric Vehicle myself?

- While you can clear the code using an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent it from reoccurring.

8. Is the repair for the OBDII code P0B89 on a Cadillac Hybrid/Electric Vehicle expensive?

- The repair cost can vary depending on the exact cause of the high voltage reading, but it is advisable to address the issue promptly to prevent further damage and potentially higher costs.

9. Are there any common DIY solutions for the OBDII code P0B89 on a Cadillac Hybrid/Electric Vehicle?

- DIY solutions may include checking and tightening battery connections, inspecting for visible damages, and clearing the code to see if it reoccurs after addressing any potential issues.

10. How long does it typically take to repair the OBDII code P0B89 on a Cadillac Hybrid/Electric Vehicle?

- The repair time can vary based on the complexity of the issue, but it is recommended to consult a professional mechanic specializing in hybrid/electric vehicles for accurate diagnosis and efficient repair.