AutoCodes – Saturn – P1B7E Saturn

P1B7E Saturn Code - Hybrid/Electric Vehicle Battery 52 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: P1B7E Saturn indicates Hybrid/Electric Vehicle Battery 52 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 910

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 P1B7E 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 P1B7E Saturn - Hybrid/Electric Vehicle Battery 52 Circuit Performance - AutoCodes.com — P1B7E Saturn Code - Hybrid/Electric Vehicle Battery 52 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B7E Saturn?

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

How to Fix the DTC P1B7E 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 P1B7E 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 P1B7E Saturn Code

1. What does the OBDII code P1B7E mean for a Saturn?

The P1B7E code indicates a performance issue with the Hybrid/Electric Vehicle Battery 52 Circuit, signaling a problem with one of the battery modules or its associated circuitry.

2. What are the common symptoms of the P1B7E code in a Saturn vehicle?

Symptoms may include a check engine light, reduced hybrid/electric vehicle performance, decreased fuel efficiency, or the vehicle entering limp mode.

3. What causes the P1B7E code to appear in a Saturn?

Common causes include a faulty battery module, damaged wiring or connectors in the battery circuit, or a malfunctioning battery control module.

4. Can I drive my Saturn with the P1B7E code?

Itâ€™s not recommended to drive for extended periods with this code, as it may lead to further damage or reduced vehicle performance, especially in hybrid/electric systems.

5. How is the P1B7E code diagnosed by a mechanic?

A mechanic will use an OBDII scanner to retrieve the code, inspect the hybrid battery system, check wiring and connectors for damage, and test the battery module for proper voltage and performance.

6. What repairs are typically required for the P1B7E code?

Repairs may include replacing the faulty battery module, repairing damaged wiring, cleaning corroded connectors, or reprogramming the battery control module.

7. How much does it cost to fix the P1B7E code on a Saturn?

Repair costs can vary widely depending on the exact issue, ranging from a few hundred dollars for minor wiring repairs to over $1,000 if the battery module needs replacement.

8. Can the P1B7E code be caused by low battery voltage?

Yes, low or fluctuating voltage in the hybrid battery system can trigger this code, so checking the batteryâ€™s health is essential.

9. Will resetting the code fix the P1B7E issue?

Resetting the code may clear the warning temporarily, but the underlying issue needs to be addressed to prevent the code from returning.

10. Is the P1B7E code unique to Saturn hybrid/electric vehicles?

While the code is specific to hybrid/electric systems, other manufacturers may use similar codes for comparable issues in their vehicles. Always refer to the specific make and model for details.