AutoCodes – Saturn – P1BB8 Saturn

P1BB8 Saturn Code - Hybrid/Electric Vehicle Battery 71 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: P1BB8 Saturn indicates Hybrid/Electric Vehicle Battery 71 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 1,028

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 P1BB8 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 P1BB8 Saturn - Hybrid/Electric Vehicle Battery 71 Circuit Low Voltage - AutoCodes.com — P1BB8 Saturn Code - Hybrid/Electric Vehicle Battery 71 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BB8 Saturn?

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

How to Fix the DTC P1BB8 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 P1BB8 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 P1BB8 Saturn Code

1. What does the OBDII code P1BB8 mean on a Saturn?

The P1BB8 code indicates "Hybrid/Electric Vehicle Battery 71 Circuit Low Voltage," signaling a voltage issue in a specific battery circuit within the hybrid or electric system.

2. What are the common symptoms of the P1BB8 code in a Saturn vehicle?

Common symptoms include warning lights on the dashboard (often the check engine or hybrid system light), reduced fuel efficiency, decreased vehicle performance, or limited electric driving range.

3. What causes the P1BB8 code to appear in a Saturn hybrid or electric vehicle?

The code is typically triggered by a low voltage in battery circuit 71, which could result from a faulty battery cell, damaged wiring, corroded connections, or a malfunctioning battery control module.

4. Can the P1BB8 code damage my Saturn if left unresolved?

Ignoring this code may lead to further damage to the battery system, reduced hybrid performance, and potential safety risks, so itâ€™s important to address it promptly.

5. How can I diagnose the P1BB8 code in my Saturn hybrid or electric vehicle?

Diagnosis involves using an advanced OBDII scanner to read live battery data, visually inspecting the battery connections and wiring, and testing individual battery cells for voltage drops.

6. Is the P1BB8 code covered under my Saturn hybrid battery warranty?

It might be covered under the hybrid battery warranty, depending on your vehicleâ€™s age, mileage, and specific warranty terms. Check with your dealership or warranty provider.

7. What repairs are typically needed to fix the P1BB8 code?

Repairs may include replacing a faulty battery cell, repairing damaged wiring or connectors, updating the battery control module software, or replacing the entire battery pack in severe cases.

8. Can I drive my Saturn with the P1BB8 code active?

While the vehicle may still be drivable, itâ€™s not recommended as it could lead to further damage or leave you stranded if the hybrid system fails completely.

9. How much does it cost to fix the P1BB8 code in a Saturn vehicle?

Repair costs can vary widely, from $100 for minor wiring fixes to several thousand dollars for battery replacement, depending on the severity of the issue.

10. Can a weak 12V auxiliary battery cause the P1BB8 code in a Saturn?

While the 12V auxiliary battery supports some hybrid functions, the P1BB8 code is specific to the high-voltage hybrid battery system, so the issue is unlikely to be related to the 12V battery.