AutoCodes – Saturn – P1BB9 Saturn

P1BB9 Saturn Code - Hybrid/Electric Vehicle Battery 71 Circuit High 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: P1BB9 Saturn indicates Hybrid/Electric Vehicle Battery 71 Circuit High 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 949

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
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Code P1BB9 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 P1BB9 Saturn - Hybrid/Electric Vehicle Battery 71 Circuit High Voltage - AutoCodes.com — P1BB9 Saturn Code - Hybrid/Electric Vehicle Battery 71 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BB9 Saturn?

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

How to Fix the DTC P1BB9 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 P1BB9 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 P1BB9 Saturn Code

1. What are the common symptoms of OBDII code P1BB9 in a Saturn hybrid/electric vehicle?

The common symptoms include the check engine light illuminating on the dashboard, reduced fuel efficiency, and potential drivability issues.

2. What could cause the OBDII code P1BB9 to trigger in a Saturn hybrid/electric vehicle?

This code is typically triggered by a high voltage condition detected in the hybrid/electric vehicle battery circuit 71, indicating a potential issue with the battery pack or its components.

3. How serious is the OBDII code P1BB9 in a Saturn hybrid/electric vehicle?

This code should be taken seriously as it relates to the high voltage circuit in the vehicle's battery system. Continuing to drive with this issue unresolved can potentially lead to further damage or safety hazards.

4. What should I do if my Saturn hybrid/electric vehicle displays the OBDII code P1BB9?

It is recommended to have the vehicle inspected by a qualified technician familiar with hybrid/electric vehicles to diagnose the specific cause of the high voltage circuit issue and determine the necessary repairs.

5. Can I still drive my Saturn hybrid/electric vehicle with the OBDII code P1BB9 present?

It is not recommended to continue driving the vehicle with this code active, as it may lead to further damage to the hybrid/electric vehicle battery system or related components.

6. Are there any simple checks I can perform to troubleshoot the OBDII code P1BB9 in my Saturn hybrid/electric vehicle?

You can visually inspect the battery connections and wiring for any obvious signs of damage or corrosion. However, thorough diagnosis and repair should be handled by a professional.

7. How can I prevent the OBDII code P1BB9 from recurring in my Saturn hybrid/electric vehicle?

Regular maintenance, including checking the battery system and related components, can help prevent issues that may trigger this code. Following manufacturer recommendations for servicing is also crucial.

8. Is it safe to attempt DIY repairs for the OBDII code P1BB9 in a Saturn hybrid/electric vehicle?

Due to the high voltage nature of the hybrid/electric vehicle battery system, DIY repairs are not recommended. It is best to seek assistance from a qualified technician with experience in handling such systems.

9. How much does it typically cost to repair the OBDII code P1BB9 in a Saturn hybrid/electric vehicle?

The cost of repairs can vary depending on the specific cause of the high voltage circuit issue. It is advisable to obtain a diagnostic assessment from a professional to determine the exact cost.

10. Can the OBDII code P1BB9 be a recurring issue in Saturn hybrid/electric vehicles?

If the root cause of the high voltage circuit problem is not properly addressed during repairs, the code may recur. Thorough diagnosis and quality repairs are essential to prevent reoccurrence.