AutoCodes – Saturn – P1B4D Saturn

P1B4D Saturn Code - Hybrid/Electric Vehicle Battery 35 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: P1B4D Saturn indicates Hybrid/Electric Vehicle Battery 35 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 777

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 P1B4D 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 P1B4D Saturn - Hybrid/Electric Vehicle Battery 35 Circuit High Voltage - AutoCodes.com — P1B4D Saturn Code - Hybrid/Electric Vehicle Battery 35 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B4D Saturn?

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

How to Fix the DTC P1B4D 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 P1B4D 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 P1B4D Saturn Code

1. What are the common symptoms of OBDII code P1B4D on a Saturn Hybrid/Electric Vehicle?

- Common symptoms include illuminated check engine light, reduced power or performance, and potential issues related to the high voltage battery system.

2. What does the OBDII code P1B4D Saturn Hybrid/Electric Vehicle Battery 35 Circuit High Voltage mean?

- This code indicates a high voltage issue in the battery circuit 35 of a Saturn Hybrid/Electric Vehicle.

3. What are the possible causes of OBDII code P1B4D on a Saturn Hybrid/Electric Vehicle?

- Possible causes include a faulty high voltage battery cell, damaged battery wiring or connectors, or a malfunctioning battery management system.

4. How serious is the OBDII code P1B4D on a Saturn Hybrid/Electric Vehicle?

- This code should be addressed promptly as it relates to the high voltage system of the vehicle, which is critical for proper operation and safety.

5. Can I continue driving my Saturn Hybrid/Electric Vehicle with the P1B4D fault code?

- It is not recommended to continue driving the vehicle with this fault code present, as it could lead to further damage or safety hazards.

6. What are some repair tips for resolving the OBDII code P1B4D on a Saturn Hybrid/Electric Vehicle?

- Repair tips may include checking and repairing damaged wiring, replacing faulty battery components, and resetting the fault code after repairs are completed.

7. How can I diagnose the OBDII code P1B4D on my Saturn Hybrid/Electric Vehicle?

- Diagnosis typically involves using a compatible OBDII scanner to read the code, inspecting the high voltage battery system components, and testing for any voltage abnormalities.

8. Can a DIY enthusiast fix the OBDII code P1B4D issue on a Saturn Hybrid/Electric Vehicle?

- While some basic troubleshooting can be done by enthusiasts, it is recommended to seek professional help for diagnosing and repairing high voltage system issues due to the potential safety risks involved.

9. Are there any recalls or technical service bulletins related to the P1B4D code on Saturn Hybrid/Electric Vehicles?

- It is advisable to check with Saturn dealerships or online resources for any recalls or technical service bulletins related to this specific fault code.

10. How much does it cost to repair the OBDII code P1B4D on a Saturn Hybrid/Electric Vehicle?

- Repair costs can vary depending on the exact cause of the issue, but it is recommended to obtain estimates from qualified technicians or service centers for an accurate cost assessment.