AutoCodes – Generic – P0B8D

P0B8D Code - Hybrid/Electric Vehicle Battery 17 Circuit Low 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: P0B8D indicates Hybrid/Electric Vehicle Battery 17 Circuit Low 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 1,982

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 P0B8D 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 P0B8D - Hybrid/Electric Vehicle Battery 17 Circuit Low Voltage - AutoCodes.com — P0B8D Code - Hybrid/Electric Vehicle Battery 17 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0B8D?

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

How to Fix the DTC P0B8D?

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 P0B8D 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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Information for Specific Makes

P0B8D Buick — Hybrid/Electric Vehicle Battery 17 Circuit Low Voltage
P0B8D Cadillac — Hybrid/Electric Vehicle Battery 17 Circuit Low Voltage
P0B8D Chevrolet — Hybrid/Electric Vehicle Battery 17 Circuit Low Voltage
P0B8D GMC — Hybrid/Electric Vehicle Battery 17 Circuit Low Voltage
P0B8D Lexus — Hybrid Battery Voltage Sense 'Q' Circuit Low
P0B8D Nissan — Hybrid Battery Voltage Sense 'Q' Circuit Low
P0B8D Saturn — Hybrid/Electric Vehicle Battery 17 Circuit Low Voltage
P0B8D Toyota — Hybrid Battery Voltage Sense 'Q' Circuit Low

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 P0B8D Code

1. What are the common symptoms of OBDII code P0B8D (Hybrid/Electric Vehicle Battery 17 Circuit Low Voltage)?

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

2. What are some possible causes of OBDII code P0B8D?

- Potential causes of this code include a faulty battery, damaged wiring in the battery circuit, issues with the battery temperature sensor, or problems with the battery management system.

3. How can I diagnose the root cause of OBDII code P0B8D?

- Diagnosis typically involves conducting a thorough inspection of the hybrid/electric vehicle battery system, checking the battery voltage levels, testing the circuit connections, and using a diagnostic scan tool to retrieve specific information about the fault.

4. Can I continue driving my vehicle with the OBDII code P0B8D present?

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

5. What are some repair tips for resolving OBDII code P0B8D?

- Repair tips may include checking and repairing any damaged wiring, replacing a faulty battery, recalibrating the battery management system, and ensuring proper functioning of the battery temperature sensor.

6. Is it possible to reset OBDII code P0B8D without addressing the underlying issue?

- While you can clear the code using a diagnostic scan tool, it is crucial to address the root cause of the issue to prevent the code from reappearing and causing further problems with the vehicle.

7. How much does it typically cost to repair OBDII code P0B8D?

- The cost of repairing this code can vary depending on the specific issue causing it, the extent of the damage, and whether any components need to be replaced. It is advisable to consult with a professional mechanic for an accurate estimate.

8. Can OBDII code P0B8D be a recurring issue in hybrid/electric vehicles?

- Yes, if the root cause of the code is not properly addressed and the battery system is not maintained correctly, OBDII code P0B8D can reoccur, leading to ongoing performance issues with the vehicle.

9. Are there any preventive measures to avoid encountering OBDII code P0B8D?

- Regular maintenance of the hybrid/electric vehicle battery system, monitoring battery health, and addressing any warning signs promptly can help prevent the occurrence of OBDII code P0B8D.

10. How long does it take to repair OBDII code P0B8D?

- The repair time for this code can vary based on the complexity of the issue and the specific repair procedures needed. It is recommended to consult with a qualified mechanic to determine the estimated repair time for your vehicle.