AutoCodes – Saturn – P1B4E Saturn

P1B4E Saturn Code - Hybrid/Electric Vehicle Battery 36 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: P1B4E Saturn indicates Hybrid/Electric Vehicle Battery 36 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 1,093

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 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B4E 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 P1B4E Saturn - Hybrid/Electric Vehicle Battery 36 Circuit Performance - AutoCodes.com — P1B4E Saturn Code - Hybrid/Electric Vehicle Battery 36 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B4E Saturn?

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

How to Fix the DTC P1B4E 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 P1B4E 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 P1B4E Saturn Code

1. What are the common symptoms of OBDII code P1B4E on a Saturn hybrid/electric vehicle?

- Common symptoms include reduced fuel efficiency, difficulty starting the vehicle, and potential loss of power while driving.

2. What can cause the OBDII code P1B4E to trigger on a Saturn hybrid/electric vehicle?

- The code P1B4E is typically triggered by issues with the hybrid/electric vehicle battery 36 circuit, such as a faulty battery cell or a problem with the battery management system.

3. How can I diagnose the cause of OBDII code P1B4E on my Saturn hybrid/electric vehicle?

- Diagnosing the issue may require a specialized diagnostic tool to read the specific fault codes related to the hybrid/electric vehicle battery 36 circuit. It is recommended to consult a professional mechanic or dealership for accurate diagnosis.

4. Is it safe to continue driving my Saturn with the OBDII code P1B4E present?

- It is not recommended to continue driving the vehicle with the code P1B4E present, as it can lead to further damage to the hybrid/electric vehicle battery system and potential safety hazards.

5. What are some repair tips for addressing OBDII code P1B4E on a Saturn hybrid/electric vehicle?

- Repair tips may include checking the battery connections for corrosion, inspecting the battery cells for damage, and resetting the battery management system. However, complex repairs may require professional assistance.

6. Can I reset the OBDII code P1B4E on my Saturn hybrid/electric vehicle by disconnecting the battery?

- Disconnecting the battery may temporarily clear the code, but it is not a recommended long-term solution. The underlying issue causing the code to trigger needs to be diagnosed and repaired to prevent further problems.

7. How much does it typically cost to repair OBDII code P1B4E on a Saturn hybrid/electric vehicle?

- The cost of repairing the code P1B4E can vary depending on the specific issue causing the code to trigger. Costs may include parts replacement, labor, and diagnostic fees.

8. Can a DIY enthusiast repair OBDII code P1B4E on a Saturn hybrid/electric vehicle?

- While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing issues related to the hybrid/electric vehicle battery system may require specialized knowledge and tools best left to professionals.

9. Will the OBDII code P1B4E on my Saturn hybrid/electric vehicle cause it to fail an emissions test?

- Yes, the presence of the code P1B4E can indicate a problem with the vehicle's emissions control system, which may cause it to fail an emissions test.

10. How often should I have the hybrid/electric vehicle battery system inspected to prevent OBDII code P1B4E from triggering?

- It is recommended to have the hybrid/electric vehicle battery system inspected as part of regular maintenance or if you notice any unusual symptoms to prevent the code P1B4E from triggering.