AutoCodes – GMC – P0B50 GMC

P0B50 GMC Code - Hybrid/Electric Vehicle Battery 5 Circuit Performance

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: P0B50 GMC indicates Hybrid/Electric Vehicle Battery 5 Circuit Performance.
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 951

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B50 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 P0B50 GMC - Hybrid/Electric Vehicle Battery 5 Circuit Performance - AutoCodes.com — P0B50 GMC Code - Hybrid/Electric Vehicle Battery 5 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P0B50 GMC?

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

How to Fix the DTC P0B50 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 P0B50 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 P0B50 GMC Code

1. What does the OBDII code P0B50 mean on a GMC vehicle?

The P0B50 code indicates an issue with the performance of Hybrid/Electric Vehicle Battery 5, typically related to voltage irregularities or communication problems in the battery circuit.

2. What are the common symptoms of the P0B50 code?

Symptoms may include the hybrid system warning light, reduced fuel efficiency, limited hybrid functionality, or the vehicle switching to gasoline-only mode.

3. What causes the P0B50 code to appear?

Common causes include a faulty hybrid battery cell, damaged wiring or connectors in the battery circuit, a defective battery control module, or corrosion in the electrical connections.

4. Can I drive my GMC vehicle with the P0B50 code?

While driving may still be possible, it is not recommended, as the hybrid system may not operate efficiently, leading to further damage or reduced performance.

5. How is the P0B50 code diagnosed?

A technician will use a scan tool to read data from the hybrid battery system, inspect wiring and connectors, and test the battery control module and individual battery cells for faults.

6. What repairs are commonly needed for the P0B50 code?

Repairs may include replacing faulty battery cells, repairing or replacing damaged wiring or connectors, cleaning corroded connections, or replacing the battery control module.

7. How much does it cost to fix the P0B50 code on a GMC vehicle?

Repair costs can vary widely, ranging from $200 for minor wiring repairs to over $1,000 if the hybrid battery or control module needs replacement.

8. Can a weak 12-volt battery cause the P0B50 code?

While unlikely, a weak 12-volt battery can sometimes affect diagnostic readings; however, the code specifically pertains to the hybrid battery system.

9. How can I prevent the P0B50 code from reoccurring?

Regular maintenance of the hybrid battery system, inspecting and cleaning electrical connections, and addressing warning lights promptly can help prevent this code.

10. Does the P0B50 code affect fuel economy?

Yes, the code can lead to reduced fuel efficiency as the hybrid system may not function properly, requiring the engine to rely more on gasoline power.