AutoCodes – GMC – P1B1E GMC

P1B1E GMC Code - Hybrid/Electric Vehicle Battery 29 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: P1B1E GMC indicates Hybrid/Electric Vehicle Battery 29 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 796

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B1E 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 P1B1E GMC - Hybrid/Electric Vehicle Battery 29 Circuit High Voltage - AutoCodes.com — P1B1E GMC Code - Hybrid/Electric Vehicle Battery 29 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B1E GMC?

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

How to Fix the DTC P1B1E 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 P1B1E 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 P1B1E GMC Code

1. What are the common symptoms of OBDII code P1B1E in a GMC Hybrid/Electric Vehicle?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and potential illumination of the check engine light.

2. What can cause the OBDII code P1B1E related to the Hybrid/Electric Vehicle Battery 29 Circuit High Voltage in a GMC?

- The code may be triggered by issues such as a faulty high voltage battery pack, damaged wiring in the battery circuit, or a malfunctioning battery management system.

3. How serious is the OBDII code P1B1E in a GMC Hybrid/Electric Vehicle?

- This code should be addressed promptly as it indicates a potential problem with the high voltage system, which is critical for the vehicle's operation and safety.

4. Can I continue driving my GMC Hybrid/Electric Vehicle with the P1B1E fault code?

- It is not recommended to continue driving the vehicle with this fault code present, as it can lead to further damage to the hybrid system components.

5. What are some DIY repair tips for resolving the P1B1E fault code in a GMC Hybrid/Electric Vehicle?

- DIY repair options may include checking for loose or damaged battery connections, inspecting the wiring harness for any visible damage, and resetting the fault code using an OBDII scanner.

6. How much does it typically cost to repair the OBDII code P1B1E in a GMC Hybrid/Electric Vehicle?

- Repair costs can vary depending on the specific underlying issue, but they may range from a few hundred to a few thousand dollars, especially if components like the high voltage battery pack need to be replaced.

7. Is it safe to reset the OBDII code P1B1E without addressing the underlying issue in a GMC Hybrid/Electric Vehicle?

- It is not recommended to simply reset the fault code without investigating and resolving the root cause, as this may lead to recurring issues and potential safety hazards.

8. How can I prevent the OBDII code P1B1E from reoccurring in my GMC Hybrid/Electric Vehicle?

- Regular maintenance of the high voltage system, including checking the battery pack health, ensuring proper wiring connections, and following manufacturer recommendations, can help prevent the code from reoccurring.

9. Are there any recalls or technical service bulletins related to the OBDII code P1B1E in GMC Hybrid/Electric Vehicles?

- It's advisable to check with a GMC dealership or the manufacturer's website for any recalls or technical service bulletins specific to the P1B1E fault code in your vehicle model.

10. Can a certified mechanic diagnose and repair the OBDII code P1B1E in a GMC Hybrid/Electric Vehicle?

- Yes, a certified mechanic with experience in hybrid/electric vehicle systems can diagnose the P1B1E fault code using specialized tools and repair the underlying issue effectively.