AutoCodes – Saturn – P1BC4 Saturn

P1BC4 Saturn Code - Hybrid/Electric Vehicle Battery 75 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: P1BC4 Saturn indicates Hybrid/Electric Vehicle Battery 75 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 869

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1BC4 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 P1BC4 Saturn - Hybrid/Electric Vehicle Battery 75 Circuit Low Voltage - AutoCodes.com — P1BC4 Saturn Code - Hybrid/Electric Vehicle Battery 75 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BC4 Saturn?

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

How to Fix the DTC P1BC4 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 P1BC4 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.

Need more information about the P1BC4 Saturn code?

Need more information on how to fix the P1BC4 Saturn code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1BC4 Saturn code diagnosed by a professional: Find a repair shop in your area

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 P1BC4 Saturn Code

1. What are the common symptoms of OBDII code P1BC4 in a Saturn hybrid/electric vehicle?

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

2. What can cause the OBDII code P1BC4 indicating Hybrid/Electric Vehicle Battery 75 Circuit Low Voltage in a Saturn?

- Possible causes include a faulty battery cell, issues with battery management system, wiring problems, or a defective battery control module.

3. How can I diagnose the OBDII code P1BC4 in my Saturn hybrid/electric vehicle?

- Diagnosis typically involves using a diagnostic scan tool to retrieve the code, inspecting the high voltage battery system components, and checking for any visible signs of damage or corrosion.

4. What are some repair tips for addressing the Hybrid/Electric Vehicle Battery 75 Circuit Low Voltage code in a Saturn?

- Repair tips may include checking and repairing any damaged wiring, replacing faulty battery cells, recalibrating the battery management system, or reprogramming the battery control module.

5. Is it safe to drive my Saturn with the OBDII code P1BC4 present?

- It is recommended to avoid driving the vehicle if possible, as continued operation with low voltage in the hybrid/electric battery system can potentially cause further damage or safety hazards.

6. Can I reset the OBDII code P1BC4 in my Saturn without fixing the underlying issue?

- While you can clear the code using a scan tool, it is important to address the root cause to prevent the code from reappearing and ensure the proper functioning of the hybrid/electric system.

7. How much does it typically cost to repair the Hybrid/Electric Vehicle Battery 75 Circuit Low Voltage issue in a Saturn?

- Repair costs can vary depending on the exact cause of the problem, but it may range from a few hundred to a couple thousand dollars, especially if battery components need to be replaced.

8. Can a DIY enthusiast with automotive experience fix the OBDII code P1BC4 in a Saturn?

- Repairing this code may require specialized knowledge and tools due to the high voltage nature of the hybrid/electric system, so it is recommended to consult a professional or a certified mechanic for proper diagnosis and repair.

9. Are there any recalls or technical service bulletins related to the OBDII code P1BC4 in Saturn vehicles?

- It is advisable to check with the manufacturer or authorized dealerships for any relevant recalls or bulletins that may provide guidance or assistance in addressing this specific issue.

10. How can I prevent the recurrence of the OBDII code P1BC4 in my Saturn hybrid/electric vehicle?

- Regular maintenance of the high voltage battery system, including proper charging habits and timely inspections, can help prevent issues leading to the code P1BC4 and ensure the longevity of the vehicle's hybrid/electric components.