AutoCodes – Generic – P1B48

P1B48 Code - Hybrid/Electric Vehicle Battery 34 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: P1B48 indicates Hybrid/Electric Vehicle Battery 34 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 1,192

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 P1B48 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 P1B48 - Hybrid/Electric Vehicle Battery 34 Circuit Performance - AutoCodes.com — P1B48 Code - Hybrid/Electric Vehicle Battery 34 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B48?

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

How to Fix the DTC P1B48?

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 P1B48 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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Need Help with the Code?

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Information for Specific Makes

P1B48 Buick — Hybrid/Electric Vehicle Battery 34 Circuit Performance
P1B48 Cadillac — Hybrid/Electric Vehicle Battery 34 Circuit Performance
P1B48 Chevrolet — Hybrid/Electric Vehicle Battery 34 Circuit Performance
P1B48 GMC — Hybrid/Electric Vehicle Battery 34 Circuit Performance
P1B48 Saturn — Hybrid/Electric Vehicle Battery 34 Circuit Performance

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 P1B48 Code

1. What are the common symptoms of OBDII code P1B48 (Hybrid/Electric Vehicle Battery 34 Circuit Performance)?

The common symptoms include poor hybrid battery performance, reduced fuel efficiency, and potential difficulty starting the vehicle.

2. What are the possible causes of OBDII code P1B48?

Possible causes of this code may include a faulty hybrid battery pack, issues with the battery cooling system, damaged wiring in the hybrid battery system, or a malfunctioning battery control module.

3. How can I diagnose the OBDII code P1B48?

Diagnosing this code typically involves using a diagnostic scan tool to retrieve the code and then conducting a thorough inspection of the hybrid battery system, including checking for any visible damage or loose connections.

4. Can I still drive my vehicle with OBDII code P1B48 present?

It is not recommended to drive your vehicle with this code present, as it can lead to further damage to the hybrid battery system and potentially cause safety issues.

5. How can I repair OBDII code P1B48?

Repairing this code may involve replacing the faulty hybrid battery pack, repairing any damaged wiring, addressing issues with the cooling system, or reprogramming the battery control module.

6. Is it safe to reset the OBDII code P1B48 without addressing the underlying issue?

It is not recommended to simply reset the code without addressing the underlying issue, as the problem will likely reoccur and could lead to more serious issues in the future.

7. How can I prevent OBDII code P1B48 from occurring in the future?

To prevent this code from occurring, it is important to regularly inspect and maintain your hybrid battery system, follow the manufacturer's recommended maintenance schedule, and address any issues promptly.

8. Can OBDII code P1B48 be triggered by a weak hybrid battery?

Yes, a weak hybrid battery can contribute to the triggering of this code, as it may struggle to perform optimally and meet the vehicle's power demands.

9. Are there any DIY repair options for OBDII code P1B48?

While some basic troubleshooting and inspection can be done DIY, repairing this code often requires specialized tools and expertise, so it is recommended to seek professional help.

10. How long does it typically take to repair OBDII code P1B48?

The repair time can vary depending on the exact cause of the issue and the extent of the repairs needed. It is best to consult with a qualified technician for a more accurate estimate.