AutoCodes – Saturn – P1BF1 Saturn

P1BF1 Saturn Code - Hybrid/Electric Vehicle Battery 90 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: P1BF1 Saturn indicates Hybrid/Electric Vehicle Battery 90 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 812

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 P1BF1 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 P1BF1 Saturn - Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage - AutoCodes.com — P1BF1 Saturn Code - Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BF1 Saturn?

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

How to Fix the DTC P1BF1 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 P1BF1 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 P1BF1 Saturn Code

1. What does the OBDII code P1BF1 mean for a Saturn vehicle?

P1BF1 indicates a "Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage," meaning there is a low voltage issue in a specific part of the hybrid or EV battery system.

2. What are the symptoms of code P1BF1 in a Saturn?

Symptoms may include the check engine light or hybrid warning light, reduced fuel efficiency, loss of hybrid functionality, or limited vehicle performance.

3. What causes the P1BF1 code to appear?

The code is typically caused by a faulty battery cell, a wiring issue, a bad voltage sensor, or a malfunction in the hybrid battery control module.

4. Can the P1BF1 code cause drivability issues?

Yes, it can lead to reduced power, limited hybrid system performance, or even prevent the hybrid system from operating altogether.

5. How is the P1BF1 code diagnosed?

A technician will typically use a scan tool to read the code, check hybrid battery voltage levels, inspect wiring and connectors, and test the battery control module.

6. Can I drive my Saturn with the P1BF1 code?

Driving is possible but not recommended, as it may further damage the hybrid system or leave you stranded if the battery system fails completely.

7. How do you fix a P1BF1 code?

Repairs may include replacing a faulty battery cell, repairing or replacing damaged wiring, or reprogramming/replacing the hybrid battery control module.

8. Is the P1BF1 code covered under warranty?

Hybrid battery issues may be covered under the manufacturerâ€™s hybrid system warranty, which is longer than the standard warranty. Check with your dealership for details.

9. How much does it cost to repair the P1BF1 code?

Repair costs vary widely depending on the issue. Battery cell replacement can cost a few hundred dollars, while a full battery replacement or control module repair can exceed $1,000.

10. Can a low 12V auxiliary battery cause the P1BF1 code?

No, the P1BF1 code specifically relates to the hybrid drive battery and not the 12V auxiliary battery. However, a weak 12V battery can cause other hybrid system issues.