AutoCodes – GMC – P1B50 GMC

P1B50 GMC Code - Hybrid/Electric Vehicle Battery 36 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: P1B50 GMC indicates Hybrid/Electric Vehicle Battery 36 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 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B50 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 P1B50 GMC - Hybrid/Electric Vehicle Battery 36 Circuit High Voltage - AutoCodes.com — P1B50 GMC Code - Hybrid/Electric Vehicle Battery 36 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B50 GMC?

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

How to Fix the DTC P1B50 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 P1B50 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 P1B50 GMC Code

1. What are the common symptoms of OBDII code P1B50 GMC related to the Hybrid/Electric Vehicle Battery 36 Circuit High Voltage?

- Common symptoms include illuminated check engine light, reduced hybrid/electric vehicle performance, and potential drivability issues.

2. What are the possible causes of OBDII code P1B50 GMC indicating Hybrid/Electric Vehicle Battery 36 Circuit High Voltage?

- Possible causes may include a malfunctioning high voltage battery pack, faulty battery management system, wiring issues, or a defective battery temperature sensor.

3. How can I diagnose the OBDII code P1B50 GMC associated with Hybrid/Electric Vehicle Battery 36 Circuit High Voltage?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the code, inspecting the high voltage battery components, checking the wiring for any signs of damage, and testing the battery temperature sensor.

4. Is it safe to drive with OBDII code P1B50 GMC triggering the Hybrid/Electric Vehicle Battery 36 Circuit High Voltage warning?

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

5. What are some repair tips for resolving OBDII code P1B50 GMC related to Hybrid/Electric Vehicle Battery 36 Circuit High Voltage?

- Repair tips may include checking and repairing any damaged wiring, replacing a faulty battery temperature sensor, resetting the battery management system, or seeking professional assistance for high voltage battery pack maintenance.

6. Can resetting the OBDII code P1B50 GMC related to Hybrid/Electric Vehicle Battery 36 Circuit High Voltage resolve the issue?

- Resetting the code may temporarily clear the warning light, but it is essential to diagnose and address the underlying cause to prevent the code from reoccurring.

7. How much does it typically cost to repair OBDII code P1B50 GMC indicating Hybrid/Electric Vehicle Battery 36 Circuit High Voltage?

- Repair costs can vary depending on the specific cause of the issue, but they may range from a few hundred to a few thousand dollars, especially if components of the high voltage battery system need to be replaced.

8. Are there any preventive maintenance measures to avoid OBDII code P1B50 GMC related to Hybrid/Electric Vehicle Battery 36 Circuit High Voltage?

- Regularly inspecting the high voltage battery system, ensuring proper cooling and ventilation, and following manufacturer-recommended maintenance schedules can help prevent issues leading to this code.

9. Can a DIY enthusiast with automotive knowledge repair OBDII code P1B50 GMC linked to Hybrid/Electric Vehicle Battery 36 Circuit High Voltage?

- While some basic diagnostics and repairs can be performed by knowledgeable DIY enthusiasts, dealing with high voltage systems in hybrid/electric vehicles requires specialized skills and safety precautions best left to professionals.

10. How long does it take to resolve OBDII code P1B50 GMC associated with Hybrid/Electric Vehicle Battery 36 Circuit High Voltage?

- The repair time can vary depending on the complexity of the issue, availability of parts, and the technician's expertise, but resolving this code may take anywhere from a few hours to a few days.