AutoCodes – Chevrolet – P1B4D Chevrolet

P1B4D Chevrolet Code - Hybrid/Electric Vehicle Battery 35 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: P1B4D Chevrolet indicates Hybrid/Electric Vehicle Battery 35 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 809

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 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B4D 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 P1B4D Chevrolet - Hybrid/Electric Vehicle Battery 35 Circuit High Voltage - AutoCodes.com — P1B4D Chevrolet Code - Hybrid/Electric Vehicle Battery 35 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B4D Chevrolet?

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

How to Fix the DTC P1B4D 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 P1B4D 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 P1B4D Chevrolet Code

1. What are the common symptoms of OBDII code P1B4D Chevrolet related to the Hybrid/Electric Vehicle Battery 35 Circuit High Voltage?

- Common symptoms include reduced engine performance, decreased fuel efficiency, and potential drivability issues.

2. What can cause the OBDII code P1B4D Chevrolet to trigger in relation to the Hybrid/Electric Vehicle Battery 35 Circuit High Voltage?

- This code can be triggered by issues such as a faulty high voltage battery pack, damaged electrical wiring, or a malfunctioning battery management system.

3. How serious is the OBDII code P1B4D Chevrolet for Hybrid/Electric Vehicle Battery 35 Circuit High Voltage?

- This code should be taken seriously as it can affect the proper functioning of the high voltage system in hybrid or electric vehicles, leading to potential safety hazards.

4. What are some possible DIY repair tips for addressing the OBDII code P1B4D Chevrolet related to the Hybrid/Electric Vehicle Battery 35 Circuit High Voltage?

- DIY repair tips may include checking and repairing any damaged wiring, ensuring proper connections in the high voltage system, and resetting the fault code with an OBDII scanner.

5. Is it safe to continue driving with the OBDII code P1B4D Chevrolet indicating an issue with the Hybrid/Electric Vehicle Battery 35 Circuit High Voltage?

- It is not recommended to continue driving with this code active, as it can lead to further damage to the high voltage system and potentially pose a safety risk.

6. How can a professional mechanic diagnose the OBDII code P1B4D Chevrolet concerning the Hybrid/Electric Vehicle Battery 35 Circuit High Voltage?

- A professional mechanic can use specialized diagnostic equipment to analyze the high voltage system, perform voltage tests, and inspect the battery pack for any faults.

7. What are the typical costs associated with repairing the OBDII code P1B4D Chevrolet related to the Hybrid/Electric Vehicle Battery 35 Circuit High Voltage?

- Repair costs can vary depending on the underlying issue, but they may involve expenses for parts replacement, labor, and diagnostic services specific to hybrid or electric vehicle systems.

8. How long does it usually take to repair the OBDII code P1B4D Chevrolet for the Hybrid/Electric Vehicle Battery 35 Circuit High Voltage?

- The repair time can vary based on the complexity of the issue, but it may take several hours to a day for a professional mechanic to diagnose and address the problem effectively.