AutoCodes – Chevrolet – U184F Chevrolet

U184F Chevrolet Code - Electric A/C Compressor Control Module Lost CommunicationWwith Engine Control Module

Quick Answer

The serial data circuit is the means by which the devices in the vehicle communicate with each other. Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine 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: U184F Chevrolet indicates Electric A/C Compressor Control Module Lost CommunicationWwith Engine Control Module.
Common causes: Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine 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 503

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U184F Chevrolet Description

The serial data circuit is the means by which the devices in the vehicle communicate with each other. Once the scan tool is connected to the serial data circuit through the Data Link Connector (DLC), the scan tool can be used to monitor each device for diagnostic purposes and to check for Diagnostic Trouble Code (DTC). When the vehicle is ON, each device communicating on the serial data circuit sends a state of health message to ensure that the device is operating properly. When a device stops communicating on the serial data circuit, for example, if the device loses power or ground, the state of health message it normally sends on the serial data circuit disappears. Other devices on the serial data circuit, which expect to receive that state of the health message, detect its absence; those devices in turn set a DTC associated with the loss of the state of health of the non-communicating device. A loss of serial data communications DTC does not represent a failure of the devices that contain the stored DTC.
The DTC will set when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U184F Chevrolet - Electric A/C Compressor Control Module Lost CommunicationWwith Engine Control Module - AutoCodes.com — U184F Chevrolet Code - Electric A/C Compressor Control Module Lost CommunicationWwith Engine Control Module

What does this mean?

What are the Possible Causes of the DTC U184F Chevrolet?

Faulty Engine Control Module (ECM)
Engine Control Module harness is open or shorted
Engine Control Module circuit poor electrical connection

How to Fix the DTC U184F Chevrolet?

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 U184F Chevrolet 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 U184F Chevrolet Code

What does the OBDII code U184F mean for my Chevrolet?

The U184F code indicates that the Electric A/C Compressor Control Module has lost communication with the Engine Control Module, which may affect the air conditioning system's operation.

What are the common symptoms associated with the U184F code?

Common symptoms include the air conditioning system not working, poor cabin cooling, and potential dashboard warning lights related to the A/C system.

What could cause the U184F code to trigger?

Causes may include a faulty A/C compressor control module, damaged wiring or connectors, a malfunctioning Engine Control Module, or issues with the vehicleâ€™s electrical system.

How do I diagnose the U184F code?

Begin by using an OBD-II scanner to confirm the code. Inspect the wiring and connectors between the A/C compressor control module and the Engine Control Module, and check for any visible damage.

What are some potential repairs for the U184F code?

Potential repairs include replacing the A/C compressor control module, repairing or replacing damaged wiring or connectors, and reprogramming or replacing the Engine Control Module if necessary.

Can I drive my vehicle with the U184F code present?

While you can drive the vehicle, you may experience a lack of air conditioning, which can be uncomfortable, especially in hot weather. It's advisable to address the issue as soon as possible.

Is the U184F code specific to Chevrolet vehicles?

While the U184F code is often associated with Chevrolet vehicles, similar codes can appear in other makes and models that use comparable systems for A/C control.

Will clearing the U184F code fix the problem?

Clearing the code may temporarily turn off the warning light, but it will not resolve the underlying issue. A proper diagnosis and repair are necessary to prevent the code from reappearing.

How can I prevent the U184F code from occurring again?

Regular maintenance of the A/C system and ensuring all electrical connections are secure and free of corrosion can help prevent future communication issues between the modules.