AutoCodes – GMC – P1B4E GMC

P1B4E GMC Code - Hybrid/Electric Vehicle Battery 36 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: P1B4E GMC indicates Hybrid/Electric Vehicle Battery 36 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 837

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 P1B4E GMC 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 P1B4E GMC - Hybrid/Electric Vehicle Battery 36 Circuit Performance - AutoCodes.com — P1B4E GMC Code - Hybrid/Electric Vehicle Battery 36 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B4E GMC?

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

How to Fix the DTC P1B4E GMC?

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 P1B4E GMC 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 P1B4E GMC Code

1. What are common symptoms of OBDII code P1B4E GMC related to Hybrid/Electric Vehicle Battery 36 Circuit Performance?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and potential inability to start the vehicle.

2. What are possible causes of OBDII code P1B4E GMC indicating Hybrid/Electric Vehicle Battery 36 Circuit Performance?

- Possible causes include a faulty hybrid/electric vehicle battery, issues with the battery management system, damaged battery cells, or wiring/connectivity issues.

3. How can I diagnose the OBDII code P1B4E GMC for Hybrid/Electric Vehicle Battery 36 Circuit Performance?

- Diagnosis typically involves using a professional OBDII scanner to read the code, testing the hybrid vehicle battery for proper voltage and capacity, and inspecting the battery connections for any signs of damage or corrosion.

4. What are the repair options for addressing OBDII code P1B4E GMC related to Hybrid/Electric Vehicle Battery 36 Circuit Performance?

- Repair options may include replacing the hybrid/electric vehicle battery, repairing damaged wiring or connections, updating the battery management system software, or seeking assistance from a certified technician.

5. Can I continue driving my vehicle with OBDII code P1B4E GMC indicating Hybrid/Electric Vehicle Battery 36 Circuit Performance?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the hybrid/electric vehicle system and potentially cause safety concerns.

6. How much does it typically cost to repair OBDII code P1B4E GMC for Hybrid/Electric Vehicle Battery 36 Circuit Performance?

- Repair costs can vary depending on the specific issue, but replacing a hybrid/electric vehicle battery can range from several hundred to several thousand dollars, including parts and labor.

7. Are there any maintenance tips to prevent OBDII code P1B4E GMC related to Hybrid/Electric Vehicle Battery 36 Circuit Performance?

- Regularly inspecting and maintaining the hybrid/electric vehicle battery, following manufacturer recommendations for battery care, and addressing any warning signs promptly can help prevent this code from occurring.

8. How long does it take to repair OBDII code P1B4E GMC for Hybrid/Electric Vehicle Battery 36 Circuit Performance?

- The repair time can vary depending on the complexity of the issue, availability of parts, and technician expertise, but it may take several hours to a few days to complete the repair.