AutoCodes – GMC – P0A84 GMC

P0A84 GMC Code - Hybrid/EV Battery Pack Cooling Fan Control 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: P0A84 GMC indicates Hybrid/EV Battery Pack Cooling Fan Control 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 803

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 P0A84 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 P0A84 GMC - Hybrid/EV Battery Pack Cooling Fan Control Circuit Low Voltage - AutoCodes.com — P0A84 GMC Code - Hybrid/EV Battery Pack Cooling Fan Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0A84 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 P0A84 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 P0A84 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 P0A84 GMC code?

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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 P0A84 GMC Code

1. What are the common symptoms of OBDII code P0A84 in a GMC Hybrid/EV vehicle?

- Common symptoms may include the hybrid/EV battery pack cooling fan running at a higher speed than normal, reduced cooling fan operation, or an illuminated check engine light.

2. What can cause the OBDII code P0A84 "Hybrid/EV Battery Pack Cooling Fan Control Circuit Low Voltage" in a GMC vehicle?

- This code can be triggered by issues such as a faulty cooling fan motor, damaged wiring or connectors in the cooling fan circuit, or a malfunctioning cooling fan control module.

3. How can I diagnose the cause of OBDII code P0A84 in my GMC Hybrid/EV vehicle?

- Diagnosis typically involves inspecting the cooling fan, checking the wiring and connectors for damage, testing the cooling fan control module, and using a scan tool to analyze the voltage levels in the cooling fan circuit.

4. Can I continue driving my GMC Hybrid/EV vehicle with OBDII code P0A84 present?

- It is not recommended to drive the vehicle with this code present, as it can lead to overheating of the battery pack and potential damage to the hybrid/EV system.

5. What are some repair tips for resolving OBDII code P0A84 in a GMC Hybrid/EV vehicle?

- Repair tips include checking and repairing any damaged wiring or connectors, replacing the cooling fan motor if faulty, and resetting the fault code after completing the repairs.

6. Is it possible to reset OBDII code P0A84 in a GMC vehicle without fixing the underlying issue?

- While you can clear the code temporarily, it will likely return if the root cause of the low voltage in the cooling fan control circuit is not addressed.

7. How critical is it to address OBDII code P0A84 promptly in a GMC Hybrid/EV vehicle?

- It is crucial to address this code promptly to prevent potential overheating of the battery pack and ensure the proper operation of the cooling system in the hybrid/EV vehicle.

8. Are there any common mistakes to avoid when diagnosing OBDII code P0A84 in a GMC Hybrid/EV vehicle?

- Common mistakes include overlooking damaged wiring or connectors, failing to test the cooling fan control module, or assuming the issue lies solely with the cooling fan motor.

9. Can extreme weather conditions impact the occurrence of OBDII code P0A84 in a GMC Hybrid/EV vehicle?

- Yes, extreme heat or cold can affect the performance of the cooling fan system, potentially leading to low voltage issues and triggering the P0A84 fault code.

10. What is the typical cost of repairing OBDII code P0A84 in a GMC Hybrid/EV vehicle?

- The cost of repair can vary depending on the specific issue causing the fault code, but it may involve expenses for parts replacement, labor, and diagnostic services.