AutoCodes – GMC – P1B86 GMC

P1B86 GMC Code - Hybrid/Electric Vehicle Battery 54 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: P1B86 GMC indicates Hybrid/Electric Vehicle Battery 54 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 721

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 P1B86 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 P1B86 GMC - Hybrid/Electric Vehicle Battery 54 Circuit High Voltage - AutoCodes.com — P1B86 GMC Code - Hybrid/Electric Vehicle Battery 54 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B86 GMC?

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

How to Fix the DTC P1B86 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 P1B86 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 P1B86 GMC Code

1. What are the common symptoms of OBDII code P1B86 GMC related to the Hybrid/Electric Vehicle Battery 54 Circuit High Voltage issue?

- The common symptoms include the check engine light coming on, reduced hybrid/electric vehicle performance, and potential issues with high-voltage battery charging.

2. What are the possible causes of OBDII code P1B86 GMC indicating a Hybrid/Electric Vehicle Battery 54 Circuit High Voltage problem?

- Possible causes can include faulty high-voltage battery cells, issues with the battery management system, damaged wiring or connectors, or a malfunctioning hybrid/electric vehicle control module.

3. How can I diagnose the OBDII code P1B86 GMC Hybrid/Electric Vehicle Battery 54 Circuit High Voltage error?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the specific fault codes, conducting a visual inspection of the high-voltage battery components, and performing electrical tests to pinpoint the issue.

4. What are some repair tips for addressing the OBDII code P1B86 GMC Hybrid/Electric Vehicle Battery 54 Circuit High Voltage problem?

- Repair tips may include repairing or replacing damaged wiring and connectors, testing and replacing faulty high-voltage battery cells, recalibrating the battery management system, or reprogramming the hybrid/electric vehicle control module.

5. Is it safe to continue driving with the OBDII code P1B86 GMC indicating a Hybrid/Electric Vehicle Battery 54 Circuit High Voltage fault?

- It is not recommended to continue driving with this fault code present, as it can lead to further damage to the high-voltage battery system and potentially compromise the safety and performance of the vehicle.

6. Can I reset the OBDII code P1B86 GMC Hybrid/Electric Vehicle Battery 54 Circuit High Voltage error by disconnecting the battery?

- While disconnecting the battery may temporarily clear the fault code, it is essential to diagnose and address the root cause of the issue to prevent it from reoccurring.

7. How much does it typically cost to repair the OBDII code P1B86 GMC Hybrid/Electric Vehicle Battery 54 Circuit High Voltage issue?

- The cost of repair can vary depending on the specific cause of the fault, the extent of the damage, and labor rates at the repair facility. It is advisable to consult with a professional technician for an accurate estimate.

8. Are there any preventive measures I can take to avoid the OBDII code P1B86 GMC Hybrid/Electric Vehicle Battery 54 Circuit High Voltage problem?

- Regular maintenance and inspections of the high-voltage battery system, following manufacturer recommendations for battery care, and addressing any warning signs promptly can help prevent this issue.