AutoCodes – Buick – P1B58 Buick

P1B58 Buick Code - Hybrid/Electric Vehicle Battery 39 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: P1B58 Buick indicates Hybrid/Electric Vehicle Battery 39 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 830

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 P1B58 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 P1B58 Buick - Hybrid/Electric Vehicle Battery 39 Circuit Low Voltage - AutoCodes.com — P1B58 Buick Code - Hybrid/Electric Vehicle Battery 39 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B58 Buick?

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

How to Fix the DTC P1B58 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 P1B58 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 P1B58 Buick Code

1. What are common symptoms of OBDII code P1B58 in a Buick hybrid/electric vehicle?

- Common symptoms include reduced power, poor fuel efficiency, and difficulty starting the vehicle.

2. What could cause the Hybrid/Electric Vehicle Battery 39 Circuit Low Voltage code (P1B58) in a Buick?

- Possible causes include a faulty battery pack, damaged battery wiring, or problems with the battery management system.

3. How can I diagnose the P1B58 code in my Buick hybrid/electric vehicle?

- Diagnosis typically involves using a diagnostic scanner to read the code, inspecting the battery connections, and testing the battery voltage levels.

4. Can I still drive my Buick with the P1B58 code present?

- It is not recommended to drive the vehicle with the P1B58 code as it may lead to further damage to the hybrid/electric system.

5. What are some repair tips for fixing the Hybrid/Electric Vehicle Battery 39 Circuit Low Voltage code?

- Repair tips may include checking and repairing any damaged wiring, replacing the battery pack if necessary, and resetting the battery management system.

6. Is it safe to attempt repairs on the hybrid/electric system related to the P1B58 code myself?

- Due to the complexity and high voltage nature of hybrid/electric systems, it is recommended to have repairs done by a qualified technician.

7. How much does it typically cost to repair the Hybrid/Electric Vehicle Battery 39 Circuit Low Voltage code in a Buick?

- Repair costs can vary depending on the extent of the damage, but it may range from a few hundred to a few thousand dollars.

8. Can a low 12-volt battery cause the P1B58 code to appear in a Buick hybrid/electric vehicle?

- Yes, a low 12-volt battery can sometimes trigger the P1B58 code due to insufficient power supply to the hybrid/electric system.

9. Will resetting the OBDII code P1B58 in my Buick clear the issue permanently?

- Resetting the code may temporarily clear the issue, but if the underlying problem is not fixed, the code is likely to reappear.

10. How often should I have the hybrid/electric system in my Buick inspected to prevent the P1B58 code from occurring?

- It is recommended to have the hybrid/electric system inspected regularly as part of routine maintenance to prevent issues like the P1B58 code from occurring.