AutoCodes – Toyota – P0B47 Toyota

P0B47 Toyota Code - Hybrid Battery Voltage Sense 'C' Circuit Low

Quick Answer

The HV battery uses nickel metal-hydride batteries and does not require external charging. Common causes include Faulty Battery smart unit, Faulty HV battery assembly. 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: P0B47 Toyota indicates Hybrid Battery Voltage Sense 'C' Circuit Low.
Common causes: Common causes include Faulty Battery smart unit, Faulty HV battery assembly.
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 13,494

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 P0B47 Toyota Description

The HV battery uses nickel metal-hydride batteries and does not require external charging. The power management control ECU controls the SOC (state of charge) of the HV battery at a constant level during driving. The HV battery is composed of 28 modules, and each module consists of eight 1.2 V cells in series. The battery smart unit monitors battery block voltage at 14 locations. Each battery block is composed of 2 modules in a set. The battery smart unit, which monitors the voltage of the battery blocks, determines that malfunction has occurred if a voltage difference between the battery blocks exceeds the standard. When the malfunction detection condition is satisfied, the power management control ECU (HV CPU) will illuminates the Malfunction Indicator Lamp (MIL) and set a Diagnostic Trouble Code (DTC).

OBDII Code P0B47 Toyota - Hybrid Battery Voltage Sense 'C' Circuit Low - AutoCodes.com — P0B47 Toyota Code - Hybrid Battery Voltage Sense 'C' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0B47 Toyota?

Faulty Battery smart unit
Faulty HV battery assembly

How to Fix the DTC P0B47 Toyota?

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 P0B47 Toyota 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 P0B47 Toyota code?

Need more information on how to fix the P0B47 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0B47 Toyota 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 P0B47 Toyota Code

1. What are the common symptoms of OBDII code P0B47 in a Toyota hybrid?

- Common symptoms include reduced fuel efficiency, poor engine performance, and the illumination of the check engine light.

2. What does the OBDII code P0B47 Toyota indicate?

- The code P0B47 indicates a problem with the Hybrid Battery Voltage Sense 'C' Circuit, specifically a low voltage reading.

3. What are the possible causes of the Hybrid Battery Voltage Sense 'C' Circuit Low code?

- Potential causes include a faulty hybrid battery voltage sensor, damaged wiring or connectors, a weak hybrid battery, or issues with the hybrid battery management system.

4. Can driving with the P0B47 code present cause further damage to the vehicle?

- Continuing to drive with the P0B47 code may lead to reduced hybrid system performance and potentially cause further damage to the hybrid battery or related components.

5. How is the Hybrid Battery Voltage Sense 'C' Circuit Low issue diagnosed?

- Diagnosis typically involves using a scan tool to retrieve the specific trouble code and then conducting further testing on the hybrid battery voltage sensor and related components.

6. What are some repair tips for addressing the P0B47 code in a Toyota hybrid?

- Repair tips may include checking the wiring and connectors for damage, testing the hybrid battery voltage sensor, and ensuring proper communication between the sensor and the hybrid battery management system.

7. Is it safe to continue driving a Toyota hybrid with the P0B47 code without addressing the issue?

- It is not recommended to continue driving with the P0B47 code present, as it can lead to performance issues and potential damage to the hybrid system components.

8. Can the P0B47 code be reset without addressing the underlying issue?

- While the code can be cleared using a scan tool, it is important to address the root cause of the issue to prevent further problems with the hybrid system.

9. How much does it typically cost to repair the Hybrid Battery Voltage Sense 'C' Circuit Low issue in a Toyota hybrid?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve replacing the hybrid battery voltage sensor, repairing wiring, or addressing other related components.

10. Are there any preventative maintenance steps to avoid encountering the P0B47 code in a Toyota hybrid?

- Regularly servicing the hybrid system, monitoring hybrid battery health, and addressing any warning lights or unusual symptoms promptly can help prevent issues like the P0B47 code from occurring.