AutoCodes – Saturn – P1B25 Saturn

P1B25 Saturn 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 Saturn 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 1,057

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

What does this mean?

What are the Possible Causes of the DTC P1B25 Saturn?

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

How to Fix the DTC P1B25 Saturn?

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 Saturn 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 Saturn Code

What does the OBDII code P1B25 mean for a Saturn vehicle?

The P1B25 code indicates a performance issue with the hybrid or electric vehicle battery, specifically related to the 32 circuit.

What are common symptoms of the P1B25 code?

Common symptoms include reduced power output, warning lights on the dashboard, poor fuel economy, and difficulty starting the vehicle.

What could cause the P1B25 code to trigger?

Possible causes include a faulty battery, damaged wiring or connectors, issues with the battery management system, or a defective hybrid control module.

How can I diagnose the P1B25 code effectively?

Start by using an OBDII scanner to confirm the code. Inspect the battery and its connections for any visible damage, check the battery voltage, and test the battery management system for faults.

What repairs might be necessary if I have a P1B25 code?

Repairs may involve replacing a faulty battery, repairing or replacing damaged wiring, updating software in the battery management system, or replacing the hybrid control module if it's defective.

Is it safe to drive a vehicle with a P1B25 code?

It is not recommended to drive a vehicle with this code, as it may lead to further battery issues or reduced vehicle performance.

Can I reset the P1B25 code after repairs?

Yes, after addressing the underlying issues, you can reset the code using an OBDII scanner. However, ensure all problems are resolved to prevent the code from reappearing.

How can I prevent the P1B25 code from occurring in the future?

Regular maintenance of the hybrid battery system, keeping connections clean and secure, and addressing any warning signs early can help prevent this code from occurring.

What should I do if the P1B25 code returns after repairs?

If the code returns, further diagnostics may be necessary to identify any underlying issues that were not addressed or additional components that may be malfunctioning.