AutoCodes – Saturn – P1BF7 Saturn

P1BF7 Saturn Code - Hybrid/Electric Vehicle Battery 92 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: P1BF7 Saturn indicates Hybrid/Electric Vehicle Battery 92 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 1,107

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 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1BF7 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 P1BF7 Saturn - Hybrid/Electric Vehicle Battery 92 Circuit Low Voltage - AutoCodes.com — P1BF7 Saturn Code - Hybrid/Electric Vehicle Battery 92 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BF7 Saturn?

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

How to Fix the DTC P1BF7 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 P1BF7 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 P1BF7 Saturn Code

What does the OBDII code P1BF7 mean on a Saturn?

The code P1BF7 indicates a "Hybrid/Electric Vehicle Battery 92 Circuit Low Voltage," meaning the vehicleâ€™s hybrid battery system has detected a low voltage issue in circuit 92.

What are the common symptoms of code P1BF7?

Symptoms include reduced fuel efficiency, activation of the check engine light, limited hybrid system functionality, or the vehicle entering limp mode.

What are the potential causes of the P1BF7 code?

Possible causes include a faulty hybrid battery cell, damaged wiring in circuit 92, a malfunctioning battery control module, or poor electrical connections.

Can I keep driving with the P1BF7 code?

Itâ€™s not recommended, as driving with this code may cause further damage to the hybrid system and could limit the vehicleâ€™s performance or efficiency.

How is the P1BF7 code diagnosed?

A technician will use a scan tool to verify the code, inspect the hybrid battery and related wiring, test voltage levels on circuit 92, and check the battery control module.

What repairs can fix code P1BF7?

Repairs may include replacing faulty battery cells, repairing or replacing damaged wiring in circuit 92, cleaning or tightening electrical connections, or replacing the battery control module if needed.

How much does it cost to fix the P1BF7 code?

The cost varies widely, from $100 for wiring repairs to $2,000 or more for hybrid battery replacement, depending on the extent of the issue.

Can a low 12-volt battery cause the P1BF7 code?

While a low 12-volt battery can cause some hybrid issues, this specific code is related to the high-voltage hybrid battery system and not the 12-volt battery.

Can clearing the P1BF7 code solve the issue?

Clearing the code without addressing the underlying issue will not fix the problem, and the code is likely to return.

Should I take my Saturn to a dealership for this code?

For hybrid system issues like P1BF7, itâ€™s often best to visit a dealership or a shop specializing in hybrid vehicles, as they have the necessary tools and expertise.