AutoCodes – GMC – P0BC8 GMC

P0BC8 GMC Code - Hybrid/EV Battery Pack Cooling Fan Performance

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: P0BC8 GMC indicates Hybrid/EV Battery Pack Cooling Fan Performance.
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 729

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 P0BC8 GMC 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 P0BC8 GMC - Hybrid/EV Battery Pack Cooling Fan Performance - AutoCodes.com — P0BC8 GMC Code - Hybrid/EV Battery Pack Cooling Fan Performance

What does this mean?

What are the Possible Causes of the DTC P0BC8 GMC?

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 P0BC8 GMC?

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 P0BC8 GMC 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 P0BC8 GMC code?

Need more information on how to fix the P0BC8 GMC code? Get Access to Factory Service Manuals

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 P0BC8 GMC Code

1. What are the common symptoms of OBDII code P0BC8 in a GMC Hybrid/EV vehicle?

- Common symptoms include the hybrid/EV battery pack cooling fan running continuously, erratic fan operation, or the cooling fan not running at all.

2. What could be causing the Hybrid/EV Battery Pack Cooling Fan Performance issue in a GMC vehicle?

- The issue could be caused by a faulty cooling fan motor, a problem with the fan control module, or wiring issues.

3. How can I diagnose the Hybrid/EV Battery Pack Cooling Fan Performance problem in my GMC Hybrid/EV vehicle?

- Diagnose the issue by checking the cooling fan fuse, inspecting the fan motor for proper operation, and scanning for any other related trouble codes.

4. Can I still drive my GMC Hybrid/EV vehicle with the P0BC8 code present?

- It is not recommended to drive with the P0BC8 code present as it can lead to overheating of the hybrid/EV battery pack, potentially causing damage.

5. How can I repair the Hybrid/EV Battery Pack Cooling Fan Performance issue in my GMC vehicle?

- To repair the issue, replace the faulty cooling fan motor, repair any wiring issues, or replace the fan control module as needed.

6. Is it possible to reset the OBDII code P0BC8 in a GMC Hybrid/EV vehicle?

- Yes, the code can be reset using an OBDII scanner after the underlying issue with the cooling fan performance has been addressed.

7. Are there any preventive maintenance tips to avoid the Hybrid/EV Battery Pack Cooling Fan Performance issue in my GMC vehicle?

- Regularly inspect the cooling fan system, keep an eye on any warning signs of fan malfunction, and ensure proper maintenance of the hybrid/EV battery pack.

8. Will the P0BC8 code illuminate the check engine light in my GMC Hybrid/EV vehicle?

- Yes, the P0BC8 code is likely to trigger the check engine light to alert you of the Hybrid/EV Battery Pack Cooling Fan Performance issue.

9. Can a DIY enthusiast with basic automotive knowledge repair the Hybrid/EV Battery Pack Cooling Fan Performance issue?

- Depending on the specific cause, a DIY enthusiast may be able to troubleshoot and repair simple issues like a blown fuse, but more complex repairs may require professional assistance.

10. How important is it to address the OBDII code P0BC8 in a timely manner for a GMC Hybrid/EV vehicle?

- It is crucial to address the P0BC8 code promptly to prevent potential damage to the hybrid/EV battery pack and ensure the proper functioning of the cooling system.