AutoCodes – GMC – P1B8F GMC

P1B8F GMC Code - Hybrid/Electric Vehicle Battery 57 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: P1B8F GMC indicates Hybrid/Electric Vehicle Battery 57 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 919

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 P1B8F 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 P1B8F GMC - Hybrid/Electric Vehicle Battery 57 Circuit High Voltage - AutoCodes.com — P1B8F GMC Code - Hybrid/Electric Vehicle Battery 57 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B8F GMC?

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

How to Fix the DTC P1B8F 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 P1B8F 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 P1B8F GMC Code

1. What are common symptoms of OBDII code P1B8F GMC related to Hybrid/Electric Vehicle Battery 57 Circuit High Voltage?

- Common symptoms include poor vehicle performance, reduced fuel efficiency, and the illumination of the check engine light.

2. What are possible causes of OBDII code P1B8F GMC indicating Hybrid/Electric Vehicle Battery 57 Circuit High Voltage?

- Possible causes may include a faulty high voltage battery cell, issues with the battery management system, or damaged electrical wiring.

3. How can I diagnose the OBDII code P1B8F GMC on my hybrid/electric vehicle?

- Diagnosis can be performed using a professional OBDII scanner to read the code, followed by a thorough inspection of the high voltage battery system by a qualified technician.

4. Is it safe to continue driving my vehicle with the OBDII code P1B8F GMC present?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the high voltage battery system and potentially pose a safety risk.

5. What are the repair options for resolving OBDII code P1B8F GMC on a GMC hybrid/electric vehicle?

- Repair options may include replacing the faulty battery cell, repairing damaged wiring, recalibrating the battery management system, or performing a software update.

6. Can I reset the OBDII code P1B8F GMC myself, or do I need to take it to a professional?

- It is advisable to have a professional diagnose and reset the code to ensure proper repair and prevent further issues with the high voltage battery system.

7. How much does it typically cost to repair OBDII code P1B8F GMC on a GMC hybrid/electric vehicle?

- Repair costs can vary depending on the extent of the damage and the specific components needing replacement, but repairs related to high voltage battery issues can be expensive.

8. Are there any preventive maintenance tips to avoid encountering OBDII code P1B8F GMC on my GMC hybrid/electric vehicle?

- Regularly scheduled maintenance, such as checking the high voltage battery system, monitoring battery health, and following manufacturer recommendations, can help prevent issues leading to this code.

9. Can extreme weather conditions affect the likelihood of OBDII code P1B8F GMC appearing on a GMC hybrid/electric vehicle?

- Yes, extreme temperatures can impact the performance and health of the high voltage battery system, potentially leading to issues triggering this specific OBDII code.

10. How long does it typically take to repair OBDII code P1B8F GMC on a GMC hybrid/electric vehicle?

- Repair times can vary depending on the complexity of the issue, availability of parts, and the skill of the technician, but it may take several hours to a few days to fully resolve this code.