AutoCodes – Buick – P1B75 Buick

P1B75 Buick Code - Hybrid/Electric Vehicle Battery 49 Circuit Performance

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: P1B75 Buick indicates Hybrid/Electric Vehicle Battery 49 Circuit Performance.
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 936

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 P1B75 Buick 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 P1B75 Buick - Hybrid/Electric Vehicle Battery 49 Circuit Performance - AutoCodes.com — P1B75 Buick Code - Hybrid/Electric Vehicle Battery 49 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B75 Buick?

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

How to Fix the DTC P1B75 Buick?

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 P1B75 Buick 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 P1B75 Buick Code

1. What are the common symptoms of OBDII code P1B75 in a Buick hybrid/electric vehicle?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and potential difficulty starting the vehicle.

2. What typically causes the OBDII code P1B75 in a Buick hybrid/electric vehicle?

- This code is usually triggered by issues with the hybrid/electric vehicle battery 49 circuit, such as a faulty battery module or wiring issues.

3. How can I diagnose the OBDII code P1B75 in my Buick hybrid/electric vehicle?

- Diagnosing this code may require specialized diagnostic tools to check the battery 49 circuit, battery modules, and associated wiring for any faults or damage.

4. Is it safe to continue driving my Buick with the OBDII code P1B75 present?

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

5. Can I repair the OBDII code P1B75 in my Buick hybrid/electric vehicle myself?

- Repairing this code may require advanced knowledge and expertise in hybrid/electric vehicle systems, so it is recommended to seek assistance from a certified technician.

6. How much does it typically cost to repair the OBDII code P1B75 in a Buick hybrid/electric vehicle?

- The cost of repairs for this code can vary depending on the extent of the issue, but it may involve replacing faulty battery modules or repairing damaged wiring, which can be expensive.

7. Are there any maintenance tips to prevent the OBDII code P1B75 from recurring in my Buick hybrid/electric vehicle?

- Regularly inspecting and maintaining the hybrid/electric vehicle battery system, as well as following the manufacturer's recommended maintenance schedule, can help prevent this code from recurring.

8. Can a low or dead battery cause the OBDII code P1B75 to appear in a Buick hybrid/electric vehicle?

- Yes, a low or dead battery can potentially trigger this code, as it can affect the performance of the hybrid/electric system and the battery 49 circuit.

9. How urgent is it to address the OBDII code P1B75 in my Buick hybrid/electric vehicle?

- It is recommended to address this code as soon as possible to prevent further damage to the hybrid/electric system and ensure the vehicle operates safely and efficiently.

10. Will resetting the OBDII code P1B75 in my Buick hybrid/electric vehicle make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue with the battery 49 circuit is not addressed, the code is likely to reappear.