AutoCodes – Buick – U2615 Buick

U2615 Buick Code - Auxiliary Transmission Fluid Pump Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Auxiliary Transmission Fluid Pump Control Module, Auxiliary Transmission Fluid Pump Control Module harness is open or shorted, Auxiliary Transmission Fluid Pump Control Module 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: U2615 Buick indicates Auxiliary Transmission Fluid Pump Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2.
Common causes: Common causes include Faulty Auxiliary Transmission Fluid Pump Control Module, Auxiliary Transmission Fluid Pump Control Module harness is open or shorted, Auxiliary Transmission Fluid Pump Control Module 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 488

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 Jun 18, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2615 Buick Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device.
This diagnostic is used to check the loss of communication with the Hybrid/EV Powertrain Control Module 2 on a high-speed General Motors Local Area Network (GMLAN) bus. The Battery Energy Control Module supervises a periodic serial data message to check the communication status of the Hybrid/EV Powertrain Control Module 2. If this message is not received within 400 ms, the Battery Energy Control Module increases its fail count. When this fail count is over X Cal Value (7) during Y Cal Value (10 samples), the diagnostic status of this code is set to Failed and transmitted over high voltage energy high-speed GMLAN bus to the Hybrid/EV Powertrain Control Module 2.
The Diagnostic Trouble Code (DTC) will set when a supervised periodic message that includes the transmitter device availability has not been received within 400 ms.

OBDII Code U2615 Buick - Auxiliary Transmission Fluid Pump Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 - AutoCodes.com — U2615 Buick Code - Auxiliary Transmission Fluid Pump Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2

What does this mean?

What are the Possible Causes of the DTC U2615 Buick?

Faulty Auxiliary Transmission Fluid Pump Control Module
Auxiliary Transmission Fluid Pump Control Module harness is open or shorted
Auxiliary Transmission Fluid Pump Control Module circuit poor electrical connection
Faulty Hybrid/EV Powertrain Control Module 2

How to Fix the DTC U2615 Buick?

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 U2615 Buick 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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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 U2615 Buick Code

1. What are the common symptoms of OBDII code U2615 in a Buick?

- Common symptoms include transmission shifting issues, reduced power or acceleration, illuminated warning lights on the dashboard, and potential difficulties starting the vehicle.

2. What can cause the OBDII code U2615 to trigger in a Buick?

- The code U2615 can be triggered by a communication breakdown between the Auxiliary Transmission Fluid Pump Control Module and the Hybrid/EV Powertrain Control Module 2 in the vehicle.

3. How serious is the U2615 code in a Buick?

- While the code itself may not directly affect the drivability of the vehicle, it is important to address communication issues between control modules to ensure the proper functioning of the transmission system.

4. How can I diagnose the OBDII code U2615 in my Buick?

- Diagnosing the U2615 code typically involves using a professional OBDII scanner to retrieve the code, checking for any other related codes or symptoms, and inspecting the wiring and connectors between the control modules.

5. Can I continue driving my Buick with the U2615 code present?

- It is not recommended to ignore the U2615 code and continue driving the vehicle without addressing the underlying communication issue, as it can potentially lead to further transmission problems or safety concerns.

6. What are some possible repair tips for the U2615 code in a Buick?

- Repair tips may include checking and repairing any damaged wiring or connectors, updating control module software, and ensuring proper communication between the affected modules.

7. How much does it typically cost to repair the U2615 code in a Buick?

- The cost of repairing the U2615 code can vary depending on the underlying issue, labor costs, and the need for any replacement parts. It is recommended to consult with a professional mechanic for an accurate estimate.

8. Can I reset the U2615 code in my Buick on my own?

- While you may be able to clear the code temporarily using an OBDII scanner, it is important to address the root cause of the communication problem to prevent the code from reoccurring.

9. Is the U2615 code specific to Buick vehicles only?

- The U2615 code is specific to Buick vehicles and relates to communication issues between the Auxiliary Transmission Fluid Pump Control Module and the Hybrid/EV Powertrain Control Module 2.

10. How can I prevent the U2615 code from coming back in my Buick?

- Regular maintenance, keeping control modules updated, and addressing any communication issues promptly can help prevent the U2615 code from reoccurring in your Buick.