AutoCodes – Saturn – P0B48 Saturn

P0B48 Saturn Code - Hybrid/Electric Vehicle Battery 3 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: P0B48 Saturn indicates Hybrid/Electric Vehicle Battery 3 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 899

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B48 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 P0B48 Saturn - Hybrid/Electric Vehicle Battery 3 Circuit High Voltage - AutoCodes.com — P0B48 Saturn Code - Hybrid/Electric Vehicle Battery 3 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0B48 Saturn?

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

How to Fix the DTC P0B48 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 P0B48 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 P0B48 Saturn Code

1. What does the OBDII code P0B48 on a Saturn mean?

The P0B48 code indicates "Hybrid/Electric Vehicle Battery 3 Circuit High Voltage," meaning the voltage in battery module 3 of the hybrid/electric system is higher than expected.

2. What are the common symptoms of the P0B48 code on a Saturn?

Symptoms may include warning lights on the dashboard, reduced hybrid system performance, decreased fuel efficiency, or the vehicle entering limp mode.

3. What causes the P0B48 code to appear?

This code can be caused by a faulty battery module, damaged wiring or connections, a malfunctioning battery management system, or a sensor issue within the hybrid battery circuit.

4. Can I drive my Saturn with the P0B48 code?

Driving with this code is not recommended, as it may lead to further damage to the hybrid system or cause the vehicle to lose power unexpectedly.

5. How is the P0B48 code diagnosed?

A technician will use a scan tool to access the hybrid system's data, inspect the wiring and connections of battery module 3, and test the module for proper voltage levels.

6. What repairs are typically needed for the P0B48 code?

Repairs may include replacing the faulty battery module, repairing damaged wiring or connectors, or reprogramming/updating the battery management system.

7. Is the P0B48 code specific to Saturn vehicles?

While this code can occur in other hybrid or electric vehicles, the exact diagnosis and repair steps may vary by manufacturer and model.

8. Can a dead 12V battery cause the P0B48 code?

A weak or dead 12V battery is unlikely to directly cause this code but can affect the hybrid system's overall operation and should be checked.

9. How much does it cost to fix the P0B48 code on a Saturn?

Repair costs can vary widely, ranging from $200 for minor wiring repairs to over $1,000 if a battery module replacement is required.

10. Can clearing the code fix the P0B48 issue?

Clearing the code may temporarily remove the warning, but it will not fix the underlying issue causing the high voltage in battery module 3. Proper diagnosis and repair are necessary.