AutoCodes – Cadillac – P1B25 Cadillac

P1B25 Cadillac Code - Hybrid/Electric Vehicle Battery 32 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: P1B25 Cadillac indicates Hybrid/Electric Vehicle Battery 32 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 1,009

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 P1B25 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 P1B25 Cadillac - Hybrid/Electric Vehicle Battery 32 Circuit Performance - AutoCodes.com — P1B25 Cadillac Code - Hybrid/Electric Vehicle Battery 32 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B25 Cadillac?

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

How to Fix the DTC P1B25 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 P1B25 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.

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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 P1B25 Cadillac Code

1. What are the common symptoms of OBDII code P1B25 in a Cadillac hybrid/electric vehicle?

- Common symptoms include reduced battery performance, decreased fuel efficiency, and potential issues with vehicle acceleration.

2. What are the possible causes of OBDII code P1B25 in a Cadillac hybrid/electric vehicle?

- Possible causes include faulty battery cells, damaged battery wiring or connectors, issues with the battery management system, or software glitches.

3. How can I diagnose the OBDII code P1B25 in my Cadillac hybrid/electric vehicle?

- Diagnosis typically involves using a diagnostic scan tool to read the code, inspecting the battery system components for visible damage, and performing a battery load test.

4. Can I drive my Cadillac hybrid/electric vehicle with the OBDII code P1B25 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 unsafe driving conditions.

5. How can I repair OBDII code P1B25 in my Cadillac hybrid/electric vehicle?

- Repair options may include replacing faulty battery cells, repairing damaged wiring or connectors, resetting the battery management system, or updating software as recommended by the manufacturer.

6. Are there any preventative maintenance tips to avoid OBDII code P1B25 in a Cadillac hybrid/electric vehicle?

- Regularly scheduled maintenance, such as battery health checks and software updates, can help prevent issues leading to this code. Additionally, avoiding extreme temperature conditions can also help prolong battery life.

7. Is it safe to reset the OBDII code P1B25 in my Cadillac hybrid/electric vehicle without addressing the underlying issue?

- While resetting the code may temporarily clear the warning light, it is not recommended as the underlying issue causing the code may still persist and lead to further problems.

8. Can a DIY enthusiast perform repairs for OBDII code P1B25 in a Cadillac hybrid/electric vehicle?

- Depending on the level of expertise and access to specialized tools, some DIY enthusiasts may be able to perform basic repairs for this code. However, complex battery system repairs are best handled by trained professionals.

9. How long does it typically take to repair OBDII code P1B25 in a Cadillac hybrid/electric vehicle?

- The repair time can vary based on the specific issue causing the code, but it may range from a few hours to a full day, especially if complex diagnostic procedures or component replacements are required.

10. Can OBDII code P1B25 in a Cadillac hybrid/electric vehicle be covered under warranty?

- Depending on the vehicle's warranty coverage and the underlying cause of the code, repairs for OBDII code P1B25 may be covered under certain warranties, such as the hybrid/electric vehicle system warranty. It is recommended to check with the manufacturer or dealership for specific details.