AutoCodes – GMC – P1B59 GMC

P1B59 GMC Code - Hybrid/Electric Vehicle Battery 39 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: P1B59 GMC indicates Hybrid/Electric Vehicle Battery 39 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 832

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1B59 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 P1B59 GMC - Hybrid/Electric Vehicle Battery 39 Circuit High Voltage - AutoCodes.com — P1B59 GMC Code - Hybrid/Electric Vehicle Battery 39 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B59 GMC?

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

How to Fix the DTC P1B59 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 P1B59 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.

Need more information about the P1B59 GMC code?

Need more information on how to fix the P1B59 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1B59 GMC code diagnosed by a professional: Find a repair shop in your area

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 P1B59 GMC Code

1. What are the common symptoms of OBDII code P1B59 in a GMC hybrid/electric vehicle?

- Common symptoms include poor fuel economy, reduced power, illuminated check engine light, and potentially a noticeable decrease in overall performance.

2. What can cause the OBDII code P1B59 to trigger in a GMC hybrid/electric vehicle?

- This code is typically triggered by a fault in the high voltage circuit within the hybrid/electric vehicle battery system. This could be due to a damaged battery cell, faulty wiring, or a malfunctioning battery management system.

3. How can I diagnose the underlying issue causing code P1B59 in my GMC hybrid/electric vehicle?

- Diagnosis usually involves conducting a thorough inspection of the high voltage battery system, checking for any visible damage, testing the battery cells, and using specialized diagnostic tools to analyze the system's voltage levels.

4. Is it safe to continue driving my GMC hybrid/electric vehicle with the P1B59 code present?

- It is not recommended to drive the vehicle with this code present, as it could lead to further damage to the high voltage system and potentially pose safety risks. It's best to have the issue diagnosed and repaired promptly.

5. Can I reset the OBDII code P1B59 in my GMC hybrid/electric vehicle on my own?

- While you can clear the code using an OBDII scanner, it is essential to address the underlying issue causing the code to prevent it from reoccurring. Simply clearing the code without fixing the root problem may lead to more extensive issues down the line.

6. What are some repair tips for fixing the OBDII code P1B59 in a GMC hybrid/electric vehicle?

- Repairing this code often involves replacing the faulty battery cell, repairing damaged wiring, or recalibrating the battery management system. It is recommended to have a professional technician perform these repairs.

7. How much does it typically cost to repair the P1B59 code in a GMC hybrid/electric vehicle?

- The cost of repairs can vary depending on the extent of the damage and the specific components that need to be replaced. It's best to consult with a qualified mechanic or dealership for an accurate estimate.

8. Can a DIY enthusiast with hybrid/electric vehicle knowledge repair the P1B59 code themselves?

- Repairing issues related to high voltage systems in hybrid/electric vehicles can be complex and dangerous. It is recommended to seek professional help to ensure the repair is done correctly and safely.

9. Are there any preventive measures to avoid encountering the P1B59 code in a GMC hybrid/electric vehicle?

- Regular maintenance of the high voltage battery system, such as checking for leaks, monitoring battery health, and following the manufacturer's recommended service schedule, can help prevent issues that trigger this code.

10. How long does it take to repair the P1B59 code in a GMC hybrid/electric vehicle?

- The repair time can vary based on the specific issue causing the code and the availability of parts. Some repairs may be completed in a few hours, while more extensive issues could take longer, potentially requiring the vehicle to be in the shop for a day or more.