AutoCodes – GMC – P1BEF GMC

P1BEF GMC Code - Hybrid/Electric Vehicle Battery 89 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: P1BEF GMC indicates Hybrid/Electric Vehicle Battery 89 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 760

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 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1BEF 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 P1BEF GMC - Hybrid/Electric Vehicle Battery 89 Circuit High Voltage - AutoCodes.com — P1BEF GMC Code - Hybrid/Electric Vehicle Battery 89 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BEF GMC?

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

How to Fix the DTC P1BEF 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 P1BEF 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 P1BEF GMC Code

1. What are the common symptoms of OBDII code P1BEF GMC on a hybrid/electric vehicle?

- Common symptoms include warning lights on the dashboard, reduced vehicle performance, and potential issues with the hybrid/electric battery system.

2. What could cause the OBDII code P1BEF GMC indicating Hybrid/Electric Vehicle Battery 89 Circuit High Voltage?

- The code could be triggered by issues such as a faulty high voltage battery pack, damaged battery modules, or problems with the battery management system.

3. How serious is the OBDII code P1BEF GMC related to high voltage in a hybrid/electric vehicle?

- This code should be taken seriously as it pertains to the high voltage system of the vehicle, which can pose safety risks if not addressed promptly.

4. Can driving with the OBDII code P1BEF GMC present any dangers to the driver or passengers?

- Continuing to drive with this code present can potentially lead to further damage to the high voltage system and may pose safety risks due to the high voltage nature of the system.

5. What steps can be taken to diagnose and repair OBDII code P1BEF GMC on a GMC hybrid/electric vehicle?

- It is recommended to have the vehicle diagnosed by a qualified technician with experience in hybrid/electric vehicle systems to pinpoint the exact cause before proceeding with any repairs.

6. Is it safe to attempt DIY repairs for the OBDII code P1BEF GMC on a hybrid/electric vehicle?

- Due to the high voltage nature of the system involved, it is not recommended for inexperienced individuals to attempt repairs on this code. Professional help is advised.

7. How much can I expect to pay for repairs related to the OBDII code P1BEF GMC on a GMC hybrid/electric vehicle?

- Repair costs can vary depending on the specific cause of the code, but they may involve expenses related to high voltage battery system components and labor for diagnostics and repairs.

8. Are there any preventative measures to avoid encountering the OBDII code P1BEF GMC on a hybrid/electric vehicle?

- Regular maintenance and inspections of the high voltage system, as recommended by the manufacturer, can help prevent issues that may trigger this code.

9. Can the OBDII code P1BEF GMC be cleared/reset without fixing the underlying issue on a GMC hybrid/electric vehicle?

- Clearing the code without addressing the underlying problem is not recommended, as it will likely return until the root cause is properly diagnosed and repaired.

10. How long can I safely drive with the OBDII code P1BEF GMC before getting it repaired on a hybrid/electric vehicle?

- It is best to avoid driving the vehicle with this code present, as it pertains to the high voltage system and may lead to further damage or safety hazards if ignored.