AutoCodes – GMC – P1BFE GMC

P1BFE GMC Code - Hybrid/Electric Vehicle Battery 94 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: P1BFE GMC indicates Hybrid/Electric Vehicle Battery 94 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 970

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 P1BFE 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 P1BFE GMC - Hybrid/Electric Vehicle Battery 94 Circuit High Voltage - AutoCodes.com — P1BFE GMC Code - Hybrid/Electric Vehicle Battery 94 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BFE GMC?

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

How to Fix the DTC P1BFE 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 P1BFE 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 P1BFE GMC Code

1. What does the OBDII code P1BFE mean on a GMC vehicle?

P1BFE indicates an issue with the Hybrid/Electric Vehicle Battery 94 Circuit, specifically detecting a high voltage reading beyond the expected range.

2. What are the common symptoms of the P1BFE code in a GMC vehicle?

Symptoms may include an illuminated check engine light, reduced hybrid or electric performance, limited battery charging, or the vehicle entering limp mode.

3. What causes the P1BFE code to appear?

Common causes include a malfunctioning battery module, damaged wiring or connectors in the battery circuit, or a fault in the hybrid/electric power control module.

4. Can I continue driving with the P1BFE code active?

Driving with this code is not recommended, as it may lead to further damage to the hybrid or electric system and result in reduced vehicle performance.

5. How is the P1BFE code diagnosed in a GMC vehicle?

A technician will use a diagnostic scanner to read the code, inspect the battery circuit for damaged wiring or connectors, and test the hybrid/electric battery module for faults.

6. What repairs might fix the P1BFE code on a GMC vehicle?

Repairs may involve replacing a faulty battery module, repairing or replacing damaged wiring or connectors, or reprogramming/updating the hybrid power control module.

7. How much does it cost to fix the P1BFE code on a GMC vehicle?

Repair costs vary depending on the issue, ranging from $100 for minor wiring repairs to over $1,000 for battery module replacement.

8. Can a weak 12-volt battery cause the P1BFE code?

While unlikely, a weak 12-volt battery can sometimes affect the diagnostics of the hybrid system. Itâ€™s worth testing and replacing the 12-volt battery if itâ€™s near the end of its life.

9. Is the P1BFE code specific to GMC hybrid/electric vehicles?

Yes, the P1BFE code is specific to hybrid or electric GMC vehicles and relates to their high-voltage battery systems.

10. How can I prevent the P1BFE code from recurring?

Regularly inspect and maintain the battery system, ensure wiring and connectors are in good condition, and address any hybrid system warnings promptly.