AutoCodes – Saturn – P1B7C Saturn

P1B7C Saturn Code - Hybrid/Electric Vehicle Battery 51 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: P1B7C Saturn indicates Hybrid/Electric Vehicle Battery 51 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 902

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 P1B7C 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 P1B7C Saturn - Hybrid/Electric Vehicle Battery 51 Circuit Low Voltage - AutoCodes.com — P1B7C Saturn Code - Hybrid/Electric Vehicle Battery 51 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B7C Saturn?

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

How to Fix the DTC P1B7C 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 P1B7C 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 P1B7C Saturn code?

Need more information on how to fix the P1B7C Saturn code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1B7C 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 P1B7C Saturn Code

1. What are the common symptoms of OBDII code P1B7C Saturn Hybrid/Electric Vehicle Battery 51 Circuit Low Voltage?

- Common symptoms include poor fuel economy, difficulty starting the vehicle, reduced power, and the illumination of the check engine light.

2. What are some possible causes of OBDII code P1B7C Saturn Hybrid/Electric Vehicle Battery 51 Circuit Low Voltage?

- Possible causes include a faulty hybrid/electric vehicle battery, damaged wiring or connectors in the battery circuit, or a malfunctioning battery management system.

3. How can I diagnose OBDII code P1B7C Saturn Hybrid/Electric Vehicle Battery 51 Circuit Low Voltage?

- Diagnosis typically involves using a scan tool to read the code, inspecting the battery and related components for physical damage, and testing the battery voltage and connections.

4. Is it safe to continue driving with OBDII code P1B7C Saturn Hybrid/Electric Vehicle Battery 51 Circuit Low Voltage?

- It is not recommended to continue driving with this code as it can lead to further damage to the vehicle's electrical system and potentially cause a breakdown.

5. What are some repair tips for fixing OBDII code P1B7C Saturn Hybrid/Electric Vehicle Battery 51 Circuit Low Voltage?

- Repair tips may include checking and repairing any damaged wiring or connectors, replacing the hybrid/electric vehicle battery if necessary, and resetting the fault code after repairs are completed.

6. Can resetting the fault code for OBDII code P1B7C Saturn Hybrid/Electric Vehicle Battery 51 Circuit Low Voltage fix the issue?

- Resetting the fault code may temporarily clear the check engine light, but if the underlying issue causing the code is not addressed, the problem is likely to reoccur.

7. How much does it typically cost to repair OBDII code P1B7C Saturn Hybrid/Electric Vehicle Battery 51 Circuit Low Voltage?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve expenses for parts, labor, and diagnostic services.

8. Are there any preventive measures to avoid OBDII code P1B7C Saturn Hybrid/Electric Vehicle Battery 51 Circuit Low Voltage?

- Regular maintenance of the hybrid/electric vehicle battery system, such as checking connections and monitoring battery health, can help prevent issues that may trigger this fault code.

9. Can extreme weather conditions affect OBDII code P1B7C Saturn Hybrid/Electric Vehicle Battery 51 Circuit Low Voltage?

- Yes, extreme temperatures can impact the performance of the hybrid/electric vehicle battery, potentially leading to voltage fluctuations and triggering this fault code.

10. Is it necessary to visit a dealership for repairs related to OBDII code P1B7C Saturn Hybrid/Electric Vehicle Battery 51 Circuit Low Voltage?

- While a dealership may have specialized knowledge and tools for hybrid/electric vehicle repairs, independent automotive shops with experience in these systems can also diagnose and repair the issue effectively.