AutoCodes – Generic – P0B90

P0B90 Code - Hybrid/Electric Vehicle Battery 18 Circuit

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: P0B90 indicates Hybrid/Electric Vehicle Battery 18 Circuit.
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 1,315

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B90 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 P0B90 - Hybrid/Electric Vehicle Battery 18 Circuit - AutoCodes.com — P0B90 Code - Hybrid/Electric Vehicle Battery 18 Circuit

What does this mean?

What are the Possible Causes of the DTC P0B90?

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

How to Fix the DTC P0B90?

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 P0B90 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

P0B90 Buick — Hybrid/Electric Vehicle Battery 18 Circuit
P0B90 Cadillac — Hybrid/Electric Vehicle Battery 18 Circuit
P0B90 Chevrolet — Hybrid/Electric Vehicle Battery 18 Circuit
P0B90 GMC — Hybrid/Electric Vehicle Battery 18 Circuit
P0B90 Saturn — Hybrid/Electric Vehicle Battery 18 Circuit

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 P0B90 Code

1. What does OBDII code P0B90 mean for a hybrid/electric vehicle?

When you see code P0B90, it indicates an issue with the Hybrid/Electric Vehicle Battery 18 Circuit.

2. What are the common symptoms of OBDII code P0B90?

Common symptoms of code P0B90 include decreased hybrid/electric vehicle performance, reduced fuel efficiency, and potential issues with battery charging.

3. What are the possible causes of OBDII code P0B90?

Causes of code P0B90 may include damaged wiring in the Hybrid/Electric Vehicle Battery 18 Circuit, a faulty battery control module, or issues with the battery itself.

4. How can I diagnose OBDII code P0B90?

Diagnosing code P0B90 typically involves using a scan tool to read the code, inspecting the Hybrid/Electric Vehicle Battery 18 Circuit for damage, and checking for any loose connections or faulty components.

5. Is it safe to continue driving with OBDII code P0B90?

It's not recommended to continue driving with code P0B90, as it can lead to further damage to the hybrid/electric vehicle system. It's best to address the issue promptly.

6. Can I repair OBDII code P0B90 on my own?

Repairing code P0B90 may require specialized knowledge and equipment related to hybrid/electric vehicle systems. It's advisable to consult a professional technician for proper diagnosis and repair.

7. How much does it typically cost to fix OBDII code P0B90?

The cost of fixing code P0B90 can vary depending on the specific cause of the issue. Repairs may range from a few hundred to several thousand dollars, depending on the extent of the problem.

8. Are there any maintenance tips to prevent OBDII code P0B90 from recurring?

Regular maintenance of the hybrid/electric vehicle system, including checking the battery connections and wiring, can help prevent code P0B90 from recurring. Following the manufacturer's recommended maintenance schedule is also crucial.

9. Can OBDII code P0B90 be triggered by a simple loose connection?

Yes, a loose connection in the Hybrid/Electric Vehicle Battery 18 Circuit can trigger code P0B90. Checking and securing all connections is a good first step in troubleshooting this issue.

10. How urgent is it to address OBDII code P0B90?

It's important to address code P0B90 promptly to prevent further damage to the hybrid/electric vehicle system. Ignoring the issue can lead to more significant problems and potentially higher repair costs.