AutoCodes – Chevrolet – P0BC9 Chevrolet

P0BC9 Chevrolet Code - Hybrid/EV Battery Pack Cooling Fan Feedback Circuit Low Voltage

Quick Answer

The hybrid/EV battery pack cooling fan draws air through the hybrid/EV battery pack to control the temperature of the hybrid/EV battery pack. Common causes include Faulty Hybrid/EV Battery Pack Cooling Fan, Hybrid/EV Battery Pack Cooling Fan harness is open or shorted, Hybrid/EV Battery Pack Cooling Fan 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: P0BC9 Chevrolet indicates Hybrid/EV Battery Pack Cooling Fan Feedback Circuit Low Voltage.
Common causes: Common causes include Faulty Hybrid/EV Battery Pack Cooling Fan, Hybrid/EV Battery Pack Cooling Fan harness is open or shorted, Hybrid/EV Battery Pack Cooling Fan 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.

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Code Popularity 1,578

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 Nov 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0BC9 Chevrolet Description

The hybrid/EV battery pack cooling fan draws air through the hybrid/EV battery pack to control the temperature of the hybrid/EV battery pack. To operate, the cooling fan receives an enable signal from the starter/generator control module. The enable control is controlled by a discrete high side driver in the starter/generator control module. When the enable control circuit is high, the fan will be enabled. The fan speed is controlled by a fan control circuit from the starter/generator control module, by changing the duty cycle. The maximum fan speed is 3900 RPM. Hybrid/EV battery pack cooling fan enable circuit open and short to voltage diagnostics run continuously until hybrid/EV battery pack cooling fan is enabled to run while short to ground runs after it is enabled to run. These diagnostics detect and report a failure of the fan to enable circuits.

OBDII Code P0BC9 Chevrolet - Hybrid/EV Battery Pack Cooling Fan Feedback Circuit Low Voltage - AutoCodes.com — P0BC9 Chevrolet Code - Hybrid/EV Battery Pack Cooling Fan Feedback Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0BC9 Chevrolet?

Faulty Hybrid/EV Battery Pack Cooling Fan
Hybrid/EV Battery Pack Cooling Fan harness is open or shorted
Hybrid/EV Battery Pack Cooling Fan circuit poor electrical connection
Faulty Starter/Generator Control Module

How to Fix the DTC P0BC9 Chevrolet?

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 P0BC9 Chevrolet 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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Need Help with the Code?

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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 P0BC9 Chevrolet Code

1. What are the common symptoms of OBDII code P0BC9 in a Chevrolet Hybrid/EV?

- Common symptoms include poor battery pack cooling system performance, increased battery temperature, and potential reduction in overall vehicle efficiency.

2. What can cause the Hybrid/EV Battery Pack Cooling Fan Feedback Circuit Low Voltage code in a Chevrolet vehicle?

- The code P0BC9 can be triggered by issues such as a faulty cooling fan, damaged wiring, a malfunctioning fan control module, or a problem with the battery management system.

3. How can I diagnose the root cause of OBDII code P0BC9 in my Chevrolet Hybrid/EV?

- Diagnosing the code may involve visually inspecting the cooling fan and related components, checking the wiring for damage, testing the fan motor for functionality, and using a diagnostic scanner to retrieve specific fault codes.

4. Is it safe to continue driving my Chevrolet Hybrid/EV with the P0BC9 code present?

- It is not recommended to drive the vehicle with the P0BC9 code active, as it can lead to potential overheating of the battery pack and other critical components, which may result in more severe damage.

5. How can I repair the Hybrid/EV Battery Pack Cooling Fan Feedback Circuit Low Voltage issue in my Chevrolet?

- Repairing the issue may involve replacing the cooling fan, repairing or replacing damaged wiring, resetting the battery management system, or recalibrating the fan control module as per manufacturer guidelines.

6. Can a DIY enthusiast fix the P0BC9 code in a Chevrolet Hybrid/EV?

- While some basic troubleshooting steps can be performed by DIY enthusiasts, it is recommended to consult with a professional mechanic or dealership for proper diagnosis and repair of the cooling fan feedback circuit low voltage issue.

7. Are there any preventive maintenance tips to avoid the P0BC9 code in a Chevrolet Hybrid/EV?

- Regularly inspecting the cooling fan system, keeping the battery pack clean and free of debris, and following the manufacturer's recommended maintenance schedule can help prevent issues leading to the P0BC9 code.

8. How long does it typically take to resolve the Hybrid/EV Battery Pack Cooling Fan Feedback Circuit Low Voltage code?

- The time to resolve the P0BC9 code can vary depending on the root cause of the issue, availability of parts, and the complexity of the repair. It is advisable to consult with a professional for an accurate estimate.

9. Will resetting the OBDII code P0BC9 by disconnecting the battery solve the problem?

- Resetting the code by disconnecting the battery may temporarily clear the fault code, but it will not address the underlying issue causing the P0BC9 code. Proper diagnosis and repair are necessary to resolve the problem effectively.

10. Can extreme weather conditions affect the occurrence of the P0BC9 code in a Chevrolet Hybrid/EV?

- Yes, extreme temperatures can impact the cooling system's performance and potentially trigger the P0BC9 code. It is essential to monitor the vehicle's cooling system and address any issues promptly, especially in harsh weather conditions.