AutoCodes – Saturn – P1B4C Saturn

P1B4C Saturn Code - Hybrid/Electric Vehicle Battery 35 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: P1B4C Saturn indicates Hybrid/Electric Vehicle Battery 35 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 805

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 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B4C 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 P1B4C Saturn - Hybrid/Electric Vehicle Battery 35 Circuit Low Voltage - AutoCodes.com — P1B4C Saturn Code - Hybrid/Electric Vehicle Battery 35 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B4C Saturn?

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

How to Fix the DTC P1B4C 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 P1B4C 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 P1B4C Saturn Code

1. What are the common symptoms of OBDII code P1B4C in a Saturn Hybrid/Electric Vehicle?

- Common symptoms include reduced hybrid/electric vehicle performance, poor fuel economy, and potential illumination of the check engine light.

2. What can cause the Hybrid/Electric Vehicle Battery 35 Circuit Low Voltage code (P1B4C) in a Saturn?

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

3. How can I diagnose the P1B4C code related to low voltage in the Hybrid/Electric Vehicle Battery of my Saturn?

- Diagnosis typically involves using a scan tool to read the code, checking the battery voltage levels, inspecting the battery connections, and performing a thorough visual inspection of the battery components.

4. Is it safe to continue driving my Saturn with the P1B4C code indicating low voltage in the Hybrid/Electric Vehicle Battery 35 Circuit?

- It is not recommended to drive the vehicle with this code present, as low voltage can affect the performance and safety of the hybrid/electric system.

5. What are the potential repair options for addressing the P1B4C code in a Saturn Hybrid/Electric Vehicle?

- Repair options may include replacing faulty battery cells, repairing damaged wiring, recalibrating the battery management system, or replacing the entire battery pack if needed.

6. Can I reset the P1B4C code myself, or do I need to take my Saturn to a professional mechanic?

- While you may be able to clear the code with a scan tool, it is crucial to address the underlying issue causing the low voltage condition by seeking professional help for proper diagnosis and repair.

7. How urgent is it to fix the P1B4C code indicating low voltage in the Hybrid/Electric Vehicle Battery of my Saturn?

- It is advisable to address the issue promptly to prevent further damage to the battery system and ensure the optimal performance of your Saturn's hybrid/electric components.

8. Are there any preventive maintenance tips to avoid encountering the P1B4C code in the future?

- Regularly inspecting the battery system, following manufacturer-recommended maintenance schedules, and avoiding deep discharges can help prevent issues leading to low voltage conditions in your Saturn.

9. Can extreme weather conditions impact the occurrence of the P1B4C code in a Saturn Hybrid/Electric Vehicle?

- Yes, extreme temperatures can affect battery performance and contribute to voltage-related issues, making it essential to monitor and maintain the battery system in such conditions.

10. How long does it typically take to repair the Hybrid/Electric Vehicle Battery 35 Circuit Low Voltage code (P1B4C) in a Saturn?

- The repair time can vary based on the specific issue causing the code, but it is recommended to consult with a professional technician to determine the exact repair timeline for your Saturn.