AutoCodes – Cadillac – P1B58 Cadillac

P1B58 Cadillac 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 Cadillac 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 795

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

What does this mean?

What are the Possible Causes of the DTC P1B58 Cadillac?

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

How to Fix the DTC P1B58 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 P1B58 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 P1B58 Cadillac Code

1. What are the common symptoms of OBDII code P1B58 in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms include reduced power, poor fuel economy, and potential issues with starting the vehicle.

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

- The code P1B58 can be triggered by a weak or failing hybrid/electric vehicle battery, a faulty battery temperature sensor, or issues with the high voltage wiring.

3. How can I diagnose the source of the low voltage issue in the Hybrid/Electric Vehicle Battery 39 Circuit?

- A thorough diagnostic scan using an OBDII scanner can help pinpoint the exact cause, along with testing the battery, sensors, and wiring for proper voltage levels.

4. Are there any safety precautions to follow when working on the high voltage components related to OBDII code P1B58?

- It is crucial to follow manufacturer safety guidelines for working on high voltage components, including wearing appropriate personal protective equipment and disabling the high voltage system before any testing or repairs.

5. Can I continue driving my Cadillac with the P1B58 code present?

- It is not recommended to drive the vehicle with the P1B58 code active, as it can lead to further damage to the hybrid/electric propulsion system and potentially leave you stranded.

6. How do I reset the OBDII code P1B58 in my Cadillac Hybrid/Electric Vehicle after making necessary repairs?

- After repairing the underlying issue causing the low voltage code, you can clear the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes.

7. Is it possible to repair the Hybrid/Electric Vehicle Battery 39 Circuit Low Voltage issue in a Cadillac without professional help?

- While some basic troubleshooting like checking connections and fuses can be done by DIY enthusiasts, diagnosing and repairing complex high voltage systems should be left to experienced technicians.

8. What are some preventative maintenance tips to avoid the recurrence of OBDII code P1B58 in my Cadillac?

- Regularly checking the hybrid/electric vehicle battery health, keeping the connections clean and secure, and following the manufacturer's recommended maintenance schedule can help prevent code P1B58 from reoccurring.

9. How much does it typically cost to repair the Hybrid/Electric Vehicle Battery 39 Circuit Low Voltage issue in a Cadillac?

- The cost of repair can vary depending on the exact cause of the issue, but it can range from a few hundred dollars for minor repairs to several thousand dollars for more complex battery or component replacements.

10. Will resolving the P1B58 code improve the overall performance and efficiency of my Cadillac Hybrid/Electric Vehicle?

- Yes, resolving the low voltage issue associated with code P1B58 can help restore the vehicle's performance, fuel efficiency, and overall reliability of the hybrid/electric propulsion system.