AutoCodes – Saturn – P1B5B Saturn

P1B5B Saturn Code - Hybrid/Electric Vehicle Battery 40 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: P1B5B Saturn indicates Hybrid/Electric Vehicle Battery 40 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 758

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 P1B5B Saturn 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 P1B5B Saturn - Hybrid/Electric Vehicle Battery 40 Circuit Low Voltage - AutoCodes.com — P1B5B Saturn Code - Hybrid/Electric Vehicle Battery 40 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B5B Saturn?

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

How to Fix the DTC P1B5B Saturn?

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 P1B5B Saturn 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 P1B5B Saturn Code

1. What are the common symptoms of OBDII code P1B5B in a Saturn Hybrid/Electric Vehicle?

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

2. What are the possible causes of the Hybrid/Electric Vehicle Battery 40 Circuit Low Voltage code in a Saturn?

- Causes can include a faulty battery pack, issues with the battery management system, or a problem with the high-voltage wiring.

3. How serious is the P1B5B code in a Saturn Hybrid/Electric Vehicle?

- This code should be addressed promptly to avoid potential damage to the hybrid/electric vehicle's battery system and ensure proper vehicle operation.

4. Can I continue driving my Saturn with the Hybrid/Electric Vehicle Battery 40 Circuit Low Voltage code?

- It is not recommended to continue driving the vehicle with this code present, as it may lead to further damage to the battery system or other components.

5. What should I do if I encounter the P1B5B code in my Saturn Hybrid/Electric Vehicle?

- It is advised to have the vehicle inspected by a qualified technician to diagnose the exact cause of the code and determine the necessary repairs.

6. How can I troubleshoot the Hybrid/Electric Vehicle Battery 40 Circuit Low Voltage code in my Saturn?

- Basic troubleshooting steps may include checking the battery connections, inspecting the high-voltage wiring for damage, and ensuring the battery pack is functioning properly.

7. Is it possible to reset the P1B5B code in a Saturn Hybrid/Electric Vehicle?

- Resetting the code may temporarily clear the warning light, but it is essential to address the underlying issue causing the code to prevent recurrence.

8. Are there any DIY repair tips for fixing the Hybrid/Electric Vehicle Battery 40 Circuit Low Voltage code in a Saturn?

- DIY repairs for this code are not recommended due to the high-voltage nature of the hybrid/electric vehicle system. It is best to seek professional assistance.

9. How much does it typically cost to repair the OBDII code P1B5B in a Saturn Hybrid/Electric Vehicle?

- Repair costs can vary depending on the exact cause of the code and the needed repairs, but they may range from a few hundred to a few thousand dollars.

10. Can a regular mechanic repair the Hybrid/Electric Vehicle Battery 40 Circuit Low Voltage code in a Saturn?

- Due to the specialized nature of hybrid/electric vehicle systems, it is recommended to seek assistance from a mechanic or dealership with experience in servicing these vehicles.