AutoCodes – Cadillac – P1B7B Cadillac

P1B7B Cadillac Code - Hybrid/Electric Vehicle Battery 51 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: P1B7B Cadillac indicates Hybrid/Electric Vehicle Battery 51 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 858

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1B7B Cadillac 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 P1B7B Cadillac - Hybrid/Electric Vehicle Battery 51 Circuit Performance - AutoCodes.com — P1B7B Cadillac Code - Hybrid/Electric Vehicle Battery 51 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B7B Cadillac?

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

How to Fix the DTC P1B7B Cadillac?

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 P1B7B Cadillac 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.

Need more information about the P1B7B Cadillac code?

Need more information on how to fix the P1B7B Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1B7B Cadillac code diagnosed by a professional: Find a repair shop in your area

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 P1B7B Cadillac Code

1. What are the common symptoms of OBDII code P1B7B Cadillac related to Hybrid/Electric Vehicle Battery 51 Circuit Performance?

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

2. What are the possible causes of OBDII code P1B7B Cadillac indicating Hybrid/Electric Vehicle Battery 51 Circuit Performance?

- The code may be triggered by issues such as a faulty battery module, damaged wiring, poor battery connections, or a malfunctioning battery management system.

3. How can I diagnose OBDII code P1B7B Cadillac regarding Hybrid/Electric Vehicle Battery 51 Circuit Performance?

- Diagnosis typically involves using a scan tool to retrieve the code, inspecting the battery components, checking for loose connections, and testing the battery module's performance.

4. Can I drive my Cadillac with OBDII code P1B7B related to Hybrid/Electric Vehicle Battery 51 Circuit Performance?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the hybrid system and affect overall performance.

5. How can I repair OBDII code P1B7B Cadillac for Hybrid/Electric Vehicle Battery 51 Circuit Performance?

- Repair options may include replacing the faulty battery module, repairing damaged wiring, ensuring secure connections, and resetting the battery management system.

6. Is it safe to reset the OBDII code P1B7B related to Hybrid/Electric Vehicle Battery 51 Circuit Performance on my Cadillac?

- Resetting the code may temporarily clear the warning lights, but it is important to address the underlying issue causing the code to prevent further damage to the hybrid system.

7. Can a DIY enthusiast fix OBDII code P1B7B Cadillac for Hybrid/Electric Vehicle Battery 51 Circuit Performance?

- While basic troubleshooting like checking connections can be done by DIY enthusiasts, more complex repairs involving battery modules or wiring may require professional assistance.

8. Are there any preventive measures to avoid OBDII code P1B7B Cadillac related to Hybrid/Electric Vehicle Battery 51 Circuit Performance?

- Regular maintenance of the hybrid system, including checking battery connections and monitoring battery performance, can help prevent issues that trigger this code.

9. How long does it typically take to repair OBDII code P1B7B Cadillac for Hybrid/Electric Vehicle Battery 51 Circuit Performance?

- The repair time can vary depending on the exact cause of the issue, but it may range from a few hours to a full day, especially if component replacement is required.

10. Will ignoring OBDII code P1B7B Cadillac regarding Hybrid/Electric Vehicle Battery 51 Circuit Performance cause further damage?

- Ignoring this code can lead to decreased hybrid system efficiency, potential battery damage, and eventually more costly repairs if the underlying issue is not addressed promptly.