AutoCodes – GMC – U152A GMC

U152A GMC Code - HVAC Control Module Lost Communication With Left Upper Auxiliary Air Temperature Door Actuator On LIN Bus

Quick Answer

The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. Common causes include Faulty Left Upper Auxiliary Air Temperature Door Actuator, Left Upper Auxiliary Air Temperature Door Actuator harness is open or shorted, Left Upper Auxiliary Air Temperature Door Actuator 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: U152A GMC indicates HVAC Control Module Lost Communication With Left Upper Auxiliary Air Temperature Door Actuator On LIN Bus.
Common causes: Common causes include Faulty Left Upper Auxiliary Air Temperature Door Actuator, Left Upper Auxiliary Air Temperature Door Actuator harness is open or shorted, Left Upper Auxiliary Air Temperature Door Actuator 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 652

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 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U152A GMC Description

The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. The serial data is transmitted over a LIN circuit between a master control module and other LIN devices within a particular subsystem. If serial data communication is lost between any of the LIN devices on the LIN bus network, the master control module will set a no communication code against the non-communicating LIN device. The Diagnostic Trouble Code (DTC) will set when a supervised periodic message to the Heating, Ventilation, and Air Conditioning (HVAC) Control Module from the xxx has not been received.

OBDII Code U152A GMC - HVAC Control Module Lost Communication With Left Upper Auxiliary Air Temperature Door Actuator On LIN Bus - AutoCodes.com — U152A GMC Code - HVAC Control Module Lost Communication With Left Upper Auxiliary Air Temperature Door Actuator On LIN Bus

What does this mean?

What are the Possible Causes of the DTC U152A GMC?

Faulty Left Upper Auxiliary Air Temperature Door Actuator
Left Upper Auxiliary Air Temperature Door Actuator harness is open or shorted
Left Upper Auxiliary Air Temperature Door Actuator circuit poor electrical connection
Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

How to Fix the DTC U152A 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 U152A 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.

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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 U152A GMC Code

1. What are the common symptoms of OBDII code U152A GMC?

- Common symptoms include improper heating or cooling inside the vehicle, inconsistent temperature control, and potential issues with the HVAC system.

2. What does the code U152A GMC indicate?

- The code U152A GMC indicates that the HVAC control module has lost communication with the left upper auxiliary air temperature door actuator on the LIN bus.

3. What are the possible causes of the HVAC control module losing communication with the left upper auxiliary air temperature door actuator?

- Possible causes include a faulty left upper auxiliary air temperature door actuator, damaged wiring or connectors, a malfunctioning HVAC control module, or issues with the LIN bus communication network.

4. How can I diagnose the OBDII code U152A GMC?

- Diagnosing this code typically involves using a scan tool to retrieve the code, checking the HVAC system components for any visible damage, and performing a thorough inspection of the wiring and connectors.

5. What are some repair tips for addressing the U152A GMC trouble code?

- Repair tips may include checking and repairing any damaged wiring or connectors, replacing the left upper auxiliary air temperature door actuator if necessary, ensuring proper communication on the LIN bus, and resetting the trouble code after repairs are completed.

6. Can I drive my vehicle with the U152A GMC trouble code?

- It is not recommended to drive your vehicle with unresolved trouble codes, as they can indicate underlying issues that may affect the performance and safety of your vehicle. It is best to address the code promptly.

7. How much does it typically cost to repair the U152A GMC trouble code?

- The cost of repairing the U152A GMC trouble code can vary depending on the specific issue causing the communication loss. Costs may include parts, labor, and diagnostic fees.

8. Are there any recalls or technical service bulletins related to the U152A GMC trouble code?

- It is recommended to check with your vehicle manufacturer or authorized service center for any recalls or technical service bulletins related to the U152A GMC trouble code, as they may provide specific guidance or solutions for this issue.

9. Can I reset the U152A GMC trouble code on my own?

- You can attempt to reset the trouble code using a scan tool, but it is important to first address the underlying issue causing the code to prevent it from reoccurring.

10. How can I prevent the U152A GMC trouble code from appearing in the future?

- Regular maintenance of the HVAC system, checking for any signs of wear or damage, and addressing any related trouble codes promptly can help prevent the U152A GMC trouble code from appearing in the future.