AutoCodes – Saturn – P1B5C Saturn

P1B5C Saturn Code - Hybrid/Electric Vehicle Battery 40 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: P1B5C Saturn indicates Hybrid/Electric Vehicle Battery 40 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 850

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 P1B5C 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 P1B5C Saturn - Hybrid/Electric Vehicle Battery 40 Circuit High Voltage - AutoCodes.com — P1B5C Saturn Code - Hybrid/Electric Vehicle Battery 40 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B5C Saturn?

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

How to Fix the DTC P1B5C 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 P1B5C 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 P1B5C Saturn Code

1. What are common symptoms of OBDII code P1B5C in a Saturn Hybrid/Electric Vehicle?

Common symptoms include poor fuel economy, reduced power, and the illumination of the check engine light.

2. What does the OBDII code P1B5C in a Saturn Hybrid/Electric Vehicle indicate?

This code specifically points to an issue with the High Voltage Battery 40 Circuit in the vehicle's hybrid/electric system.

3. What are the possible causes of OBDII code P1B5C in a Saturn Hybrid/Electric Vehicle?

Possible causes include a faulty high voltage battery pack, damaged wiring, or issues with the battery management system.

4. How can I diagnose the OBDII code P1B5C in my Saturn Hybrid/Electric Vehicle?

Diagnosis typically involves using a professional OBDII scanner to read the code, as well as conducting a thorough inspection of the high voltage battery and related components.

5. Can I still drive my Saturn Hybrid/Electric Vehicle with OBDII code P1B5C present?

It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the high voltage system and potentially pose a safety risk.

6. How can I repair OBDII code P1B5C in my Saturn Hybrid/Electric Vehicle?

Repairing this code often involves replacing the defective high voltage battery pack, repairing damaged wiring, or addressing issues with the battery management system.

7. Are there any DIY tips for addressing OBDII code P1B5C in a Saturn Hybrid/Electric Vehicle?

Due to the complexity of the high voltage system in hybrid/electric vehicles, it is best to seek professional assistance for diagnosing and repairing this code.

8. How much does it typically cost to repair OBDII code P1B5C in a Saturn Hybrid/Electric Vehicle?

Repair costs can vary depending on the extent of the damage and the specific components that need to be replaced. It is recommended to obtain quotes from reputable repair shops.

9. Can OBDII code P1B5C be intermittent in a Saturn Hybrid/Electric Vehicle?

Yes, intermittent issues with the high voltage battery 40 circuit can sometimes trigger the P1B5C code sporadically. It is important to address the underlying problem to prevent further issues.

10. Is it necessary to reset the OBDII code P1B5C after repairing the issue in a Saturn Hybrid/Electric Vehicle?

Yes, it is important to clear the code after repairing the problem to ensure the vehicle's computer registers the fix and to prevent false warnings in the future.