AutoCodes – Generic – P1B25

P1B25 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 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.

Save to My Repairs My Repairs

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

Code Popularity 11,539

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
Add Comment

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

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

What does this mean?

What are the Possible Causes of the DTC P1B25?

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

How to Fix the DTC P1B25?

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 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 P1B25 code?

Need more information on how to fix the P1B25 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1B25 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1B25 Buick — Hybrid/Electric Vehicle Battery 32 Circuit Performance
P1B25 Cadillac — Hybrid/Electric Vehicle Battery 32 Circuit Performance
P1B25 Chevrolet — Hybrid/Electric Vehicle Battery 32 Circuit Performance
P1B25 GMC — Hybrid/Electric Vehicle Battery 32 Circuit Performance
P1B25 Saturn — Hybrid/Electric Vehicle Battery 32 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 P1B25 Code

1. What are common symptoms of OBDII code P1B25 (Hybrid/Electric Vehicle Battery 32 Circuit Performance)?

- Common symptoms include reduced hybrid system performance, poor fuel efficiency, and potential illumination of the check engine light.

2. What are the possible causes of OBDII code P1B25?

- The code P1B25 can be caused by issues such as a faulty battery pack, damaged wiring in the battery circuit, or problems with the battery management system.

3. How can I diagnose the OBDII code P1B25?

- Diagnosis typically involves using a professional diagnostic tool to scan the vehicle's computer system and identify the specific fault causing the code P1B25.

4. What are the repair options for OBDII code P1B25?

- Repair options may include replacing the battery pack, repairing damaged wiring, or recalibrating the battery management system to resolve the circuit performance issue.

5. Can I drive my vehicle with OBDII code P1B25?

- It is not recommended to drive the vehicle with the code P1B25 present, as it can lead to further damage to the hybrid/electric vehicle system.

6. How much does it typically cost to repair OBDII code P1B25?

- The cost of repairing OBDII code P1B25 can vary depending on the specific issue causing the fault, but it may range from a few hundred to a few thousand dollars.

7. Is OBDII code P1B25 specific to certain hybrid or electric vehicle models?

- OBDII code P1B25 related to Hybrid/Electric Vehicle Battery 32 Circuit Performance is specific to certain hybrid and electric vehicle models equipped with this particular circuit.

8. Can a DIY enthusiast repair OBDII code P1B25 at home?

- Repairing OBDII code P1B25 may require specialized tools and expertise, so it is recommended to seek professional help to properly diagnose and repair the issue.

9. How urgent is it to address OBDII code P1B25?

- It is important to address OBDII code P1B25 promptly to prevent further damage to the hybrid/electric vehicle system and ensure optimal performance and efficiency.

10. Are there any preventive maintenance steps to avoid OBDII code P1B25 in hybrid/electric vehicles?

- Regularly servicing and maintaining the hybrid/electric vehicle system, including the battery pack and related components, can help prevent issues leading to OBDII code P1B25.