AutoCodes – GMC – P1B90 GMC

P1B90 GMC Code - Hybrid/Electric Vehicle Battery 58 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: P1B90 GMC indicates Hybrid/Electric Vehicle Battery 58 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 817

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 P1B90 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 P1B90 GMC - Hybrid/Electric Vehicle Battery 58 Circuit Performance - AutoCodes.com — P1B90 GMC Code - Hybrid/Electric Vehicle Battery 58 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B90 GMC?

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

How to Fix the DTC P1B90 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 P1B90 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 P1B90 GMC Code

1. What are the common symptoms of OBDII code P1B90 GMC related to Hybrid/Electric Vehicle Battery 58 Circuit Performance?

- Common symptoms include reduced hybrid/electric vehicle performance, decreased fuel efficiency, and potential issues with starting the vehicle.

2. What are the possible causes of OBDII code P1B90 GMC indicating Hybrid/Electric Vehicle Battery 58 Circuit Performance issues?

- Possible causes include a faulty hybrid/electric vehicle battery, issues with the battery management system, wiring problems, or a failed battery sensor.

3. How can I diagnose the OBDII code P1B90 GMC related to Hybrid/Electric Vehicle Battery 58 Circuit Performance?

- Diagnosis typically involves using a diagnostic scanner to retrieve the code, conducting a visual inspection of the battery and related components, and testing the battery voltage and connections.

4. Can I continue driving my vehicle with OBDII code P1B90 GMC indicating Hybrid/Electric Vehicle Battery 58 Circuit Performance issues?

- It is not recommended to continue driving the vehicle with this code as it can lead to further damage to the hybrid/electric system and potentially leave you stranded.

5. What are some repair tips for addressing OBDII code P1B90 GMC related to Hybrid/Electric Vehicle Battery 58 Circuit Performance?

- Repair tips may include checking and tightening battery connections, replacing any faulty sensors or components, and ensuring proper functioning of the battery management system.

6. Is it possible to reset the OBDII code P1B90 GMC indicating Hybrid/Electric Vehicle Battery 58 Circuit Performance on my own?

- While you can clear the code with a diagnostic scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.

7. How much does it typically cost to repair OBDII code P1B90 GMC related to Hybrid/Electric Vehicle Battery 58 Circuit Performance?

- Repair costs can vary depending on the exact cause of the issue, but they may range from a few hundred to a few thousand dollars, especially if the hybrid/electric battery needs to be replaced.

8. Can a DIY enthusiast without specialized tools fix OBDII code P1B90 GMC indicating Hybrid/Electric Vehicle Battery 58 Circuit Performance?

- While some basic troubleshooting and repairs can be done by a DIY enthusiast, diagnosing and fixing complex issues with the hybrid/electric system may require specialized tools and expertise.

9. Are there any safety precautions to keep in mind when dealing with OBDII code P1B90 GMC related to Hybrid/Electric Vehicle Battery 58 Circuit Performance?

- Safety precautions may include disconnecting the vehicle's battery before working on the hybrid/electric system, following manufacturer guidelines, and wearing appropriate protective gear.

10. How often should I have my hybrid/electric vehicle inspected to prevent OBDII code P1B90 GMC issues?

- It is recommended to have your hybrid/electric vehicle inspected regularly by a qualified technician to catch any potential issues early and prevent the occurrence of OBDII codes like P1B90 related to battery circuit performance.