AutoCodes – Saturn – P1B7B Saturn

P1B7B Saturn Code - Hybrid/Electric Vehicle Battery 51 Circuit Performance

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: P1B7B Saturn indicates Hybrid/Electric Vehicle Battery 51 Circuit Performance.
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 856

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 P1B7B 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 P1B7B Saturn - Hybrid/Electric Vehicle Battery 51 Circuit Performance - AutoCodes.com — P1B7B Saturn Code - Hybrid/Electric Vehicle Battery 51 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B7B Saturn?

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

How to Fix the DTC P1B7B 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 P1B7B 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 P1B7B Saturn Code

What does the OBDII code P1B7B indicate?

The P1B7B code indicates a problem with the Hybrid/Electric Vehicle Battery 51 Circuit Performance, which is related to the performance of the battery management system.

What are common symptoms of the P1B7B code?

Common symptoms include reduced engine power, warning lights on the dashboard (such as the check engine light), and potential issues with battery charging or discharging.

What causes the P1B7B code to trigger?

The code can be triggered by issues such as a faulty battery management system, poor electrical connections, damaged wiring, or a failing hybrid battery.

How can I diagnose the P1B7B code?

To diagnose the code, use an OBDII scanner to read the code and any additional codes, inspect the battery connections and wiring, and perform a voltage test on the hybrid battery.

What repairs are commonly needed for the P1B7B code?

Common repairs may include repairing or replacing faulty wiring, cleaning or securing electrical connections, or replacing the hybrid battery management system if it is malfunctioning.

Can I drive my vehicle with the P1B7B code?

It is not recommended to drive the vehicle with this code, as it can lead to reduced performance and efficiency of the hybrid system.

How can I prevent the P1B7B code from occurring?

Regular maintenance, including checking battery connections and the health of the hybrid battery, can help prevent the P1B7B code from occurring.

Is the P1B7B code serious?

Yes, the P1B7B code indicates a problem with the battery management system, which can affect vehicle performance and should be addressed promptly.

Will clearing the P1B7B code fix the problem?

Clearing the code may temporarily remove the warning light, but it will not fix the underlying issue. Proper diagnosis and repair are necessary to resolve the problem.