AutoCodes – GMC – P1B8E GMC

P1B8E GMC Code - Hybrid/Electric Vehicle Battery 57 Circuit Low 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: P1B8E GMC indicates Hybrid/Electric Vehicle Battery 57 Circuit Low 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 840

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 P1B8E 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 P1B8E GMC - Hybrid/Electric Vehicle Battery 57 Circuit Low Voltage - AutoCodes.com — P1B8E GMC Code - Hybrid/Electric Vehicle Battery 57 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B8E GMC?

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

How to Fix the DTC P1B8E 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 P1B8E 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 P1B8E GMC Code

1. What are the common symptoms of OBDII code P1B8E GMC related to the Hybrid/Electric Vehicle Battery 57 Circuit Low Voltage?

- Common symptoms include reduced electric vehicle range, poor performance, and potential issues with starting the vehicle.

2. What are the potential causes of OBDII code P1B8E GMC indicating Hybrid/Electric Vehicle Battery 57 Circuit Low Voltage?

- The code may be triggered by a faulty battery pack, damaged wiring, poor connections, or issues with the battery management system.

3. How can I diagnose the underlying issue causing OBDII code P1B8E GMC in a hybrid or electric vehicle?

- Diagnosis typically involves using a diagnostic scanner to retrieve the code, inspecting the battery pack and related components, and testing the voltage levels in the circuit.

4. Is it safe to continue driving my hybrid or electric vehicle if OBDII code P1B8E GMC is present?

- It is not recommended to continue driving the vehicle with this code as it may lead to further damage to the battery system and potentially cause safety hazards.

5. Can I reset OBDII code P1B8E GMC myself, or do I need to visit a professional mechanic?

- While you can clear the code with an OBDII scanner, it is crucial to address the underlying issue causing the fault code to prevent it from reoccurring.

6. Are there any DIY repair tips for resolving OBDII code P1B8E GMC related to Hybrid/Electric Vehicle Battery 57 Circuit Low Voltage?

- DIY repair tips may include checking and tightening loose connections, inspecting for visible damage to wiring, and ensuring the battery pack is properly secured.

7. How much does it typically cost to repair OBDII code P1B8E GMC in a hybrid or electric vehicle?

- Repair costs can vary depending on the specific issue, but they may range from a few hundred to several thousand dollars, especially if the battery pack needs replacement.

8. Can extreme weather conditions impact the likelihood of OBDII code P1B8E GMC occurring in a hybrid or electric vehicle?

- Yes, extreme temperatures can affect battery performance and increase the risk of triggering this fault code, especially in very hot or cold climates.

9. What preventive measures can I take to reduce the chances of OBDII code P1B8E GMC appearing in my hybrid or electric vehicle?

- Regularly maintaining the battery system, keeping connections clean and secure, and avoiding extreme temperature exposure can help prevent issues leading to this fault code.

10. Should I be concerned about the safety of driving my hybrid or electric vehicle if OBDII code P1B8E GMC appears intermittently?

- Any indication of a fault in the battery system should be taken seriously, and it is advisable to have the vehicle inspected by a professional to ensure safe operation.