Engine-Codes.com
Engine-Codes – GMC – U016B GMC

U016B GMC Code - Lost Communication With Electric A/C Compressor Control Module

Quick Answer

The U016B GMC code indicates that there is a communication problem between the vehicle's onboard computer system and the Electric A/C Compressor Control Module. Common causes include Faulty wiring or connectors leading to the Electric A/C Compressor Control Module, Malfunctioning A/C compressor control module, Communication bus issues within the vehicle's network. 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
U016B GMC indicates Lost Communication With Electric A/C Compressor Control Module.
Common causes
Common causes include Faulty wiring or connectors leading to the Electric A/C Compressor Control Module, Malfunctioning A/C compressor control module, Communication bus issues within the vehicle's network.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code U016B GMC Description

The U016B GMC code indicates that there is a communication problem between the vehicle's onboard computer system and the Electric A/C Compressor Control Module. The Electric A/C Compressor Control Module is responsible for regulating the operation of the air conditioning compressor in the vehicle. When communication is lost with this module, it can lead to issues with the air conditioning system, potentially resulting in a lack of cooling or inconsistent performance.

OBDII Code U016B GMC - Lost Communication With Electric A/C Compressor Control Module
U016B GMC Code - Lost Communication With Electric A/C Compressor Control Module

Common Causes of U016B GMC

  1. Faulty wiring or connectors leading to the Electric A/C Compressor Control Module
  2. Malfunctioning A/C compressor control module
  3. Communication bus issues within the vehicle's network
  4. Software glitches or programming errors within the vehicle's computer system

Symptoms of U016B GMC

  1. Loss of cooling from the air conditioning system
  2. Inconsistent or weak airflow from the vents
  3. A/C compressor not engaging
  4. Illumination of the check engine light or A/C warning light on the dashboard

How to Fix U016B GMC

  1. Begin by conducting a thorough inspection of the wiring and connectors associated with the Electric A/C Compressor Control Module. Repair or replace any damaged wiring or connectors.
  2. Use a diagnostic scan tool to communicate with the A/C compressor control module and the vehicle's computer system to identify any communication errors or faults.
  3. If necessary, replace the Electric A/C Compressor Control Module with a new unit and reprogram it to communicate effectively with the vehicle's onboard computer.
  4. Clear the diagnostic trouble codes from the vehicle's computer system and perform a test drive to ensure that the A/C system is functioning correctly.
  5. Finally, verify that the communication between the A/C compressor control module and the vehicle's computer system is stable and functioning as intended.

Cost to Fix U016B GMC

The typical repair costs for addressing a U016B GMC code can range from $200 to $500, including parts and labor. However, it's essential to note that specific diagnosis time and labor rates at auto repair shops can vary depending on various factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships and lower at independent shops. For a more precise estimate, it's recommended to inquire about local rates before proceeding with the repair.

Need more information about the U016B GMC code?

Need more information on how to fix the U016B GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U016B GMC code diagnosed by a professional: Find a repair shop in your area

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 U016B GMC Code

1. What are the common symptoms of OBDII code U016B GMC?

- Common symptoms include a non-functioning electric A/C compressor, lack of cool air from the A/C system, and an illuminated check engine light.

2. What are the possible causes of OBDII code U016B GMC?

- The code may be triggered by issues such as a faulty electric A/C compressor control module, damaged wiring or connectors, or a communication breakdown between the module and the vehicle's ECM.

3. How can I diagnose the cause of OBDII code U016B GMC?

- Diagnosing the code typically involves conducting a thorough inspection of the electric A/C compressor control module, checking the wiring and connectors for damage, and using a diagnostic scanner to determine the communication status between the module and the ECM.

4. Can I still drive my vehicle with OBDII code U016B GMC present?

- It is not recommended to drive the vehicle with this code present, as it can lead to a malfunctioning A/C system, which may affect the comfort and safety of the vehicle occupants.

5. How can I repair OBDII code U016B GMC?

- Repair options may include replacing the electric A/C compressor control module, repairing any damaged wiring or connectors, and clearing the fault code with a diagnostic scanner.

6. Are there any DIY tips for fixing OBDII code U016B GMC?

- DIY enthusiasts can start by visually inspecting the wiring and connectors for any obvious damage before considering replacing the electric A/C compressor control module.

7. Is it necessary to reset the fault code after repairing OBDII code U016B GMC?

- Yes, it is important to clear the fault code using a diagnostic scanner after repairing the issue to reset the vehicle's ECM and ensure proper functionality of the A/C system.

8. Can extreme weather conditions contribute to triggering OBDII code U016B GMC?

- Yes, extreme heat or moisture can potentially damage the electric A/C compressor control module or cause communication issues, leading to the triggering of the fault code.

9. Is OBDII code U016B GMC a common issue in GMC vehicles?

- While not extremely common, the code can occur in GMC vehicles equipped with an electric A/C compressor control module, particularly in models with older or worn components.

10. Can a professional mechanic help with diagnosing and repairing OBDII code U016B GMC?

- Yes, consulting a professional mechanic is recommended for accurate diagnosis and repair of the code to ensure the A/C system functions properly and the issue does not recur.

Discuss the causes and fixes for U016B GMC OBDII Code

Submit a New Comment

Code U016B GMC comments

No comments found for this page.