AutoCodes – GMC – U180A GMC

U180A GMC Code - Electric A/C Compressor Control Module High Speed CAN Bus Off

Quick Answer

Modules connected to the Controller Area Network (CAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Electric A/C Compressor Control Module, Electric A/C Compressor Control Module harness is open or shorted, Electric A/C Compressor 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: U180A GMC indicates Electric A/C Compressor Control Module High Speed CAN Bus Off.
Common causes: Common causes include Faulty Electric A/C Compressor Control Module, Electric A/C Compressor Control Module harness is open or shorted, Electric A/C Compressor 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 519

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U180A GMC Description

Modules connected to the Controller Area Network (CAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. Each message contains the identification number of the transmitter module. A module with a CAN serial data circuits malfunction or which loses power during the current ignition cycle will have a Loss of Communication Diagnostic Trouble Code (DTC) set by other modules that depend on information from that failed module. If any of the CAN circuit are shorted to battery voltage, ground, or between them no communication is possible on the CAN serial data bus, a Diagnostic Trouble Code will set.

OBDII Code U180A GMC - Electric A/C Compressor Control Module High Speed CAN Bus Off - AutoCodes.com — U180A GMC Code - Electric A/C Compressor Control Module High Speed CAN Bus Off

What does this mean?

What are the Possible Causes of the DTC U180A GMC?

Faulty Electric A/C Compressor Control Module
Electric A/C Compressor Control Module harness is open or shorted
Electric A/C Compressor Control Module circuit poor electrical connection

How to Fix the DTC U180A 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 U180A 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 U180A GMC Code

1. What are common symptoms of OBDII code U180A GMC?

- Common symptoms may include the air conditioning system not working properly, unusual noises coming from the A/C compressor, or the A/C system not cooling the vehicle adequately.

2. What does the OBDII code U180A GMC indicate?

- This code indicates a problem with the Electric A/C Compressor Control Module High Speed CAN Bus Off, which is related to the communication between the A/C compressor control module and the vehicle's onboard computer system.

3. What are possible causes of OBDII code U180A GMC?

- Possible causes may include a faulty A/C compressor control module, issues with the CAN bus communication system, wiring harness problems, or a malfunction in the vehicle's onboard computer system.

4. How can I diagnose the cause of OBDII code U180A GMC?

- Diagnosing this code typically involves using a OBDII scanner to retrieve the trouble codes, inspecting the A/C compressor control module and wiring connections, and testing the CAN bus communication system for any faults.

5. How can I repair OBDII code U180A GMC?

- Repairing this code may involve replacing the Electric A/C Compressor Control Module, repairing any faulty wiring connections, resetting the trouble codes with a scanner, and conducting a thorough system test to ensure proper functionality.

6. Can I drive my vehicle with OBDII code U180A GMC?

- It is not recommended to drive the vehicle with this code present, as it may lead to further damage to the A/C system components and potentially affect the overall performance of the vehicle.

7. How much does it cost to repair OBDII code U180A GMC?

- The cost of repairing this code can vary depending on the specific cause of the issue, but it may range from a few hundred dollars for parts and labor up to over a thousand dollars if major components need replacement.

8. Is OBDII code U180A GMC a common issue in GMC vehicles?

- While this code may not be extremely common, it can occur in GMC vehicles with electric A/C compressor control modules, especially in models equipped with advanced climate control systems.

9. Are there any preventive maintenance tips to avoid OBDII code U180A GMC?

- Regularly servicing the A/C system, inspecting wiring connections for any signs of wear or damage, and addressing any unusual noises or performance issues with the A/C system promptly can help prevent this code from appearing.

10. Can I reset OBDII code U180A GMC without repairing the issue?

- While you can reset the trouble codes using an OBDII scanner, it is not recommended to do so without addressing the underlying problem, as the code is likely to reappear if the root cause is not fixed.