AutoCodes – Saturn – P1B95 Saturn

P1B95 Saturn 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 Saturn 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 849

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

What does this mean?

What are the Possible Causes of the DTC P1B95 Saturn?

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

How to Fix the DTC P1B95 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 P1B95 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 P1B95 Saturn Code

1. What does the OBDII code P1B95 mean on a Saturn?

P1B95 indicates a high voltage issue in the Hybrid/Electric Vehicle Battery 59 Circuit, often related to excessive voltage or circuit faults in the battery system.

2. What are the common symptoms of the P1B95 code?

Symptoms may include warning lights on the dashboard, reduced hybrid performance, poor fuel efficiency, or the vehicle entering limp mode.

3. What causes the P1B95 code to appear?

This code can be caused by damaged wiring, a faulty high-voltage battery module, a defective battery control module, or loose or corroded connections in the circuit.

4. Can I keep driving my Saturn with the P1B95 code?

While the vehicle may still operate, continuing to drive with this code can potentially cause further damage to the hybrid system. Itâ€™s best to address the issue promptly.

5. How is the P1B95 code diagnosed?

A technician will use a scan tool to confirm the code, inspect wiring and connectors in the circuit, test the high-voltage battery module, and evaluate the battery control module for faults.

6. What repairs are typically needed for the P1B95 code?

Repairs may include replacing damaged wiring, repairing corroded connections, replacing a faulty high-voltage battery module, or reprogramming or replacing the battery control module.

7. Can a weak 12V battery trigger the P1B95 code?

While unlikely, a weak 12V battery can sometimes cause communication issues in the hybrid system, which may indirectly contribute to this code.

8. How much does it cost to fix the P1B95 code on a Saturn?

Repair costs vary depending on the root cause, but fixing wiring or connections may be inexpensive, whereas replacing a high-voltage battery module could cost thousands of dollars.

9. Can I reset the P1B95 code without repairs?

Clearing the code without addressing the underlying issue is not recommended, as the problem will likely return and may worsen over time.

10. Is the P1B95 code covered under warranty for my Saturn?

This depends on your vehicle's warranty terms. Hybrid system components often have extended warranties, so check with your dealership for coverage details.