AutoCodes – Generic – P0B29

P0B29 Code - Hybrid Battery 'B' Voltage Low

Quick Answer

The Engine Control Module (ECM) monitors the Hybrid Battery 'B' Voltage Circuit. Common causes include Faulty Hybrid Battery Pack, Hybrid Battery Pack harness is open or shorted, Hybrid Battery Pack circuit poor electrical connection. 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: P0B29 indicates Hybrid Battery 'B' Voltage Low.
Common causes: Common causes include Faulty Hybrid Battery Pack, Hybrid Battery Pack harness is open or shorted, Hybrid Battery Pack circuit poor electrical connection.
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 7,450

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 07, 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 P0B29 Description

The Engine Control Module (ECM) monitors the Hybrid Battery 'B' Voltage Circuit. The ECM sets the OBDII code when the Hybrid Battery 'B' Voltage Circuit signal is out of factory specifications.

OBDII Code P0B29 - Hybrid Battery 'B' Voltage Low - AutoCodes.com — P0B29 Code - Hybrid Battery 'B' Voltage Low

What does this mean?

What are the Possible Causes of the DTC P0B29?

Faulty Hybrid Battery Pack
Hybrid Battery Pack harness is open or shorted
Hybrid Battery Pack circuit poor electrical connection

How to Fix the DTC P0B29?

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 P0B29 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 P0B29 code?

Need more information on how to fix the P0B29 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0B29 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 P0B29 Code

1. What are the common symptoms of OBDII code P0B29 (Hybrid Battery 'B' Voltage Low)?

- The common symptoms include decreased fuel efficiency, reduced power output, and potential illumination of the hybrid system warning light.

2. What are the possible causes of OBDII code P0B29?

- The code P0B29 can be triggered by issues such as a faulty hybrid battery pack, damaged battery cells, poor battery connections, or problems with the battery management system.

3. How can I diagnose the cause of OBDII code P0B29?

- Diagnosing the cause of P0B29 typically involves conducting a thorough inspection of the hybrid battery pack, checking battery connections, assessing battery cell health, and using a diagnostic scanner to gather data from the battery management system.

4. Can I continue driving my vehicle with OBDII code P0B29 present?

- It is not recommended to continue driving your vehicle with code P0B29 active, as it may lead to further damage to the hybrid system components and potentially result in decreased performance.

5. What are the repair options for OBDII code P0B29?

- Repair options for code P0B29 may include replacing the hybrid battery pack, repairing damaged battery cells, ensuring proper battery connections, and recalibrating the battery management system.

6. How much does it typically cost to repair OBDII code P0B29?

- The cost of repairing code P0B29 can vary depending on the extent of the issue, the specific repairs needed, and the labor rates of the service provider. It is advisable to obtain quotes from different repair shops for an accurate estimate.

7. Can a DIY enthusiast fix OBDII code P0B29 at home?

- While some simple checks like inspecting battery connections can be done at home, diagnosing and repairing complex issues related to code P0B29 may require specialized tools and expertise. It is recommended to consult a professional mechanic for accurate diagnosis and repair.

8. How often does OBDII code P0B29 occur in hybrid vehicles?

- Code P0B29 related to a low voltage in the hybrid battery 'B' pack is a relatively common issue in hybrid vehicles, especially in older models or vehicles with high mileage.

9. Are there any preventive maintenance tips to avoid OBDII code P0B29?

- Regularly servicing the hybrid system, monitoring battery health, and following manufacturer recommendations for battery maintenance can help prevent issues like OBDII code P0B29.

10. Can resetting the OBDII code P0B29 clear the issue permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue causing P0B29 is not addressed, the code is likely to reappear. It is essential to diagnose and fix the root cause of the problem for a permanent solution.