AutoCodes – Generic – P1B95

P1B95 Code - Hybrid/Electric Vehicle Battery 59 Circuit High 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: P1B95 indicates Hybrid/Electric Vehicle Battery 59 Circuit High 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 1,044

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
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Code P1B95 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 P1B95 - Hybrid/Electric Vehicle Battery 59 Circuit High Voltage - AutoCodes.com — P1B95 Code - Hybrid/Electric Vehicle Battery 59 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B95?

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

How to Fix the DTC P1B95?

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 P1B95 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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Need Help with the Code?

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Information for Specific Makes

P1B95 Buick — Hybrid/Electric Vehicle Battery 59 Circuit High Voltage
P1B95 Cadillac — Hybrid/Electric Vehicle Battery 59 Circuit High Voltage
P1B95 Chevrolet — Hybrid/Electric Vehicle Battery 59 Circuit High Voltage
P1B95 GMC — Hybrid/Electric Vehicle Battery 59 Circuit High Voltage
P1B95 Saturn — Hybrid/Electric Vehicle Battery 59 Circuit High Voltage

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 P1B95 Code

1. What are common symptoms of OBDII code P1B95 (Hybrid/Electric Vehicle Battery 59 Circuit High Voltage)?

The common symptoms of code P1B95 may include illuminated warning lights on the dashboard, reduced hybrid system performance, and potential issues with the high voltage battery system.

2. What are the possible causes of OBDII code P1B95?

Possible causes of code P1B95 can include a faulty high voltage battery pack, issues with the battery management system, damaged wiring or connectors, or a malfunctioning hybrid control module.

3. How serious is OBDII code P1B95 (Hybrid/Electric Vehicle Battery 59 Circuit High Voltage)?

Code P1B95 should be addressed promptly as it relates to the high voltage system in a hybrid or electric vehicle. Continuing to drive with this code present can potentially lead to further damage or safety hazards.

4. Can I continue driving my vehicle with OBDII code P1B95 present?

It is not recommended to continue driving the vehicle with code P1B95 present, as it indicates a problem with the high voltage circuit, which can pose safety risks and may cause further damage to the vehicle.

5. How can OBDII code P1B95 be diagnosed?

Diagnosing code P1B95 typically involves using a professional OBDII scanner to retrieve the specific fault codes, conducting a visual inspection of the high voltage system components, and performing tests on the battery pack and related circuitry.

6. What are some repair tips for addressing OBDII code P1B95?

Repair tips for code P1B95 may include checking and repairing any damaged wiring or connectors, testing the high voltage battery pack for faults, resetting the fault codes after repairs, and ensuring the hybrid system is functioning properly.

7. Can I reset OBDII code P1B95 without fixing the underlying issue?

While you can clear the fault code temporarily, it is crucial to address the underlying issue causing code P1B95 to prevent potential safety hazards or further damage to the high voltage system in the vehicle.

8. Is it safe to attempt DIY repairs for OBDII code P1B95?

Due to the complexity and safety considerations of high voltage systems in hybrid and electric vehicles, it is recommended to consult a professional technician or specialized workshop for diagnosing and repairing issues related to code P1B95.

9. How much does it cost to fix OBDII code P1B95?

The cost of repairing code P1B95 can vary depending on the specific cause of the issue, the extent of repairs needed, and the labor rates of the repair shop. It is advisable to obtain quotes from qualified technicians for an accurate estimate.

10. How can I prevent OBDII code P1B95 from recurring in my hybrid or electric vehicle?

Regular maintenance, including inspections of the high voltage system components, keeping the battery pack in good condition, and addressing any warning lights promptly, can help prevent the recurrence of OBDII code P1B95 in hybrid and electric vehicles.