AutoCodes – Saturn – P1B29 Saturn

P1B29 Saturn Code - Hybrid/Electric Vehicle Battery 28 Circuit

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: P1B29 Saturn indicates Hybrid/Electric Vehicle Battery 28 Circuit.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 924

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1B29 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 P1B29 Saturn - Hybrid/Electric Vehicle Battery 28 Circuit - AutoCodes.com — P1B29 Saturn Code - Hybrid/Electric Vehicle Battery 28 Circuit

What does this mean?

What are the Possible Causes of the DTC P1B29 Saturn?

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

How to Fix the DTC P1B29 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 P1B29 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.

Need more information about the P1B29 Saturn code?

Need more information on how to fix the P1B29 Saturn code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1B29 Saturn code diagnosed by a professional: Find a repair shop in your area

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 P1B29 Saturn Code

1. What are common symptoms of OBDII code P1B29 Saturn related to the Hybrid/Electric Vehicle Battery 28 Circuit?

- Common symptoms include reduced electric vehicle range, poor battery performance, and potential inability to start the vehicle.

2. What are some possible causes of OBDII code P1B29 Saturn indicating issues with the Hybrid/Electric Vehicle Battery 28 Circuit?

- Causes may include a faulty battery pack, damaged wiring or connectors, issues with battery cooling systems, or a malfunctioning battery management system.

3. How can I diagnose the underlying issue causing OBDII code P1B29 Saturn in my Saturn hybrid/electric vehicle?

- Diagnose the issue by using a compatible OBDII scanner to read and interpret the code, inspecting the battery pack and related components, and performing voltage and resistance tests.

4. Are there any DIY repair tips for addressing OBDII code P1B29 Saturn concerning the Hybrid/Electric Vehicle Battery 28 Circuit?

- DIY repair tips may include checking and repairing damaged wiring, ensuring proper battery connections, and clearing the error code to see if it reoccurs.

5. Can driving with OBDII code P1B29 Saturn related to the Hybrid/Electric Vehicle Battery 28 Circuit cause further damage to the vehicle?

- Continuing to drive with this code present can potentially damage the battery system further, leading to more severe issues and reduced vehicle performance.

6. How crucial is it to address OBDII code P1B29 Saturn in a timely manner for a Saturn hybrid/electric vehicle owner?

- It is crucial to address this code promptly to prevent potential damage to the battery system, ensure optimal vehicle performance, and avoid safety risks.

7. Is it recommended to seek professional assistance for repairing OBDII code P1B29 Saturn in a Saturn hybrid/electric vehicle?

- Yes, it is advisable to consult a qualified technician or dealership specializing in hybrid/electric vehicles for accurate diagnosis and repair of this specific code.

8. What is the typical cost associated with repairing OBDII code P1B29 Saturn related to the Hybrid/Electric Vehicle Battery 28 Circuit?

- Repair costs can vary depending on the underlying issue, but they may include expenses for parts replacement, labor, diagnostic services, and any necessary programming or updates.

9. Are there any preventive maintenance measures to reduce the likelihood of encountering OBDII code P1B29 Saturn in a Saturn hybrid/electric vehicle?

- Regularly inspecting the battery system, following the manufacturer's maintenance schedule, and avoiding overcharging or deep discharging the battery can help prevent this code from appearing.

10. Can resetting the OBDII system clear OBDII code P1B29 Saturn related to the Hybrid/Electric Vehicle Battery 28 Circuit?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear. It is essential to diagnose and repair the root cause.