AutoCodesSaturn – P0B54 Saturn

P0B54 Saturn Code - Hybrid/Electric Vehicle Battery 6 Circuit

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
P0B54 Saturn indicates Hybrid/Electric Vehicle Battery 6 Circuit.
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 813
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 07, 2020
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Code P0B54 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 P0B54 Saturn - Hybrid/Electric Vehicle Battery 6 Circuit - AutoCodes.com
P0B54 Saturn Code - Hybrid/Electric Vehicle Battery 6 Circuit

What are the Possible Causes of the DTC P0B54 Saturn?

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

How to Fix the DTC P0B54 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 P0B54 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 P0B54 Saturn Code

What does the OBDII code P0B54 mean on a Saturn vehicle?

The code P0B54 indicates a problem with the Hybrid/Electric Vehicle Battery 6 Circuit, typically referring to a malfunction in the voltage or communication of the sixth battery module.

What are common symptoms of the P0B54 code in a Saturn?

Symptoms may include reduced fuel efficiency, decreased battery performance, warning lights on the dashboard, or limited electric drive functionality.

What causes the P0B54 code in a Saturn hybrid or electric vehicle?

Common causes include a faulty battery module, wiring harness issues, poor electrical connections, or a malfunctioning Battery Energy Control Module (BECM).

Can I drive my Saturn with the P0B54 code?

It’s possible to drive the vehicle, but performance may be reduced, and ignoring the issue could lead to further damage to the hybrid battery system.

How do I diagnose the P0B54 code in a Saturn?

Diagnosis involves checking the battery module's voltage, inspecting the wiring and connectors for damage or corrosion, and testing the Battery Energy Control Module.

How can I fix the P0B54 code on my Saturn?

Repairs may include replacing the faulty battery module, repairing damaged wires or connectors, or recalibrating the hybrid battery system using specialized tools.

How much does it cost to fix the P0B54 code in a Saturn?

Costs vary depending on the issue, but battery module replacement can range from $500 to $2,000, plus labor costs.

Does the P0B54 code mean I need to replace the entire hybrid battery?

Not necessarily. The issue may be isolated to a single module or circuit, which can often be repaired without replacing the whole battery pack.

Can a weak 12V battery cause the P0B54 code in my Saturn?

While unlikely, a weak 12V battery can sometimes cause communication errors in the hybrid control systems, so it’s worth checking.

Will clearing the P0B54 code fix the problem?

Clearing the code will remove the warning temporarily, but the underlying issue must be resolved to prevent the code from returning.

Discuss the causes and fixes for P0B54 Saturn OBDII Code

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