AutoCodes – Chevrolet – P0B48 Chevrolet

P0B48 Chevrolet 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 Chevrolet 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 1,355

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 Chevrolet 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 Chevrolet - Hybrid/Electric Vehicle Battery 3 Circuit High Voltage - AutoCodes.com — P0B48 Chevrolet Code - Hybrid/Electric Vehicle Battery 3 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0B48 Chevrolet?

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

How to Fix the DTC P0B48 Chevrolet?

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 Chevrolet 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 Chevrolet Code

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

P0B48 indicates a high voltage issue in the circuit of the hybrid or electric vehicle battery module 3, which is part of the battery management system.

2. What are the common symptoms of the P0B48 code?

Symptoms may include an illuminated check engine light, reduced fuel efficiency, limited power output, or the vehicle entering limp mode.

3. What causes the P0B48 code on a Chevrolet?

Common causes include a faulty battery module, damaged voltage sensors, corroded or loose wiring, or issues with the battery control module.

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

It is not recommended to drive with this code active, as it could lead to further damage to the hybrid battery system or cause the vehicle to lose power unexpectedly.

5. How is the P0B48 code diagnosed?

A technician will use a scan tool to confirm the code, inspect the wiring and connectors in the battery system, and test the voltage levels of the affected battery module.

6. How do you fix the P0B48 code on a Chevrolet?

Repairs may involve replacing the faulty battery module, repairing or replacing damaged wiring, or reprogramming the battery control module.

7. Can low battery coolant levels cause the P0B48 code?

Yes, insufficient battery coolant can lead to overheating, which may trigger high voltage issues and the P0B48 code.

8. What is the cost to repair the P0B48 code on a Chevrolet?

The repair cost varies but can range from $300 for wiring repairs to over $1,000 for battery module replacement, depending on the extent of the issue.

9. Can a weak 12-volt auxiliary battery cause the P0B48 code?

While rare, a weak 12-volt battery can cause communication errors in the hybrid system, potentially triggering related codes.

10. How can I prevent the P0B48 code from occurring again?

Regular maintenance of the hybrid battery system, ensuring proper coolant levels, and addressing electrical issues promptly can help prevent this code from recurring.