AutoCodes – Generic – P1B90

P1B90 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 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 2,270

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

What does this mean?

What are the Possible Causes of the DTC P1B90?

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

How to Fix the DTC P1B90?

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 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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Need Help with the Code?

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Information for Specific Makes

P1B90 Buick — Hybrid/Electric Vehicle Battery 58 Circuit Performance
P1B90 Cadillac — Hybrid/Electric Vehicle Battery 58 Circuit Performance
P1B90 Chevrolet — Hybrid/Electric Vehicle Battery 58 Circuit Performance
P1B90 GMC — Hybrid/Electric Vehicle Battery 58 Circuit Performance
P1B90 Saturn — Hybrid/Electric Vehicle Battery 58 Circuit Performance

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 Code

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

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and potentially a warning light on the dashboard.

2. What are the possible causes of OBDII code P1B90?

- The code P1B90 can be triggered by issues such as a faulty battery pack, damaged wiring or connectors in the battery circuit, or a malfunctioning battery management system.

3. How can I diagnose the cause of OBDII code P1B90?

- Diagnosing the cause of code P1B90 typically requires using a specialized diagnostic tool to access the hybrid/electric vehicle's battery system data and performing a thorough inspection of the battery pack, wiring, and connectors.

4. Can I continue to drive my vehicle with OBDII code P1B90 present?

- It is not recommended to continue driving the vehicle with code P1B90 present, as it can lead to further damage to the hybrid/electric vehicle's battery system and potentially compromise vehicle safety.

5. How can I repair OBDII code P1B90?

- Repairing code P1B90 may involve replacing a faulty battery pack, repairing damaged wiring or connectors, or recalibrating the battery management system. It is recommended to seek assistance from a qualified technician for proper diagnosis and repair.

6. Can a DIY enthusiast fix OBDII code P1B90 at home?

- Due to the complexity of hybrid/electric vehicle systems and the potential safety hazards involved, it is recommended to have a professional technician diagnose and repair OBDII code P1B90 to ensure the proper functioning of the vehicle.

7. How much does it typically cost to repair OBDII code P1B90?

- The cost of repairing OBDII code P1B90 can vary depending on the underlying cause of the issue, the extent of the damage, and the specific components that need to be replaced. It is advisable to obtain a diagnosis and cost estimate from a qualified technician.

8. Is OBDII code P1B90 a common issue in hybrid/electric vehicles?

- While OBDII code P1B90 (Hybrid/Electric Vehicle Battery 58 Circuit Performance) is not as common as some other codes, it can still occur in hybrid/electric vehicles due to various factors affecting the battery system's performance.

9. How can I prevent OBDII code P1B90 from occurring in the future?

- Regular maintenance of the hybrid/electric vehicle's battery system, including monitoring the battery health, checking for any signs of damage, and following the manufacturer's recommended service schedule, can help prevent issues like code P1B90 from occurring.

10. Can OBDII code P1B90 affect the overall performance of a hybrid/electric vehicle?

- Yes, OBDII code P1B90 can impact the overall performance of a hybrid/electric vehicle by affecting the efficiency of the battery system, potentially leading to reduced power output, decreased fuel economy, and other operational issues.