AutoCodes – Generic – U1179

U1179 Code - Invalid Or Missing Data For Climate Control

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Module that is not communicating, Module harness is open or shorted, 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: U1179 indicates Invalid Or Missing Data For Climate Control.
Common causes: Common causes include Faulty Module that is not communicating, Module harness is open or shorted, 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 4,404

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 Apr 26, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1179 Description

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for State of Health monitoring. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. When a module does not associate an identification number with at least one critical parameter within 5 seconds of beginning serial data communication, the Diagnostic Trouble Code (DTC) is set.

OBDII Code U1179 - Invalid Or Missing Data For Climate Control - AutoCodes.com — U1179 Code - Invalid Or Missing Data For Climate Control

What does this mean?

What are the Possible Causes of the DTC U1179?

Faulty Module that is not communicating
Module harness is open or shorted
Module circuit poor electrical connection

How to Fix the DTC U1179?

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 U1179 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.

Need more information about the U1179 code?

Need more information on how to fix the U1179 code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 U1179 Code

1. What does the OBDII code U1179 mean?

The code U1179 indicates "Invalid Or Missing Data For Climate Control," meaning the vehicle's climate control module is not receiving or processing data correctly from other modules.

2. What are the symptoms of the U1179 code?

Common symptoms include malfunctioning climate control features like inconsistent heating or cooling, unresponsive controls, or a climate control system that shuts down entirely.

3. What causes the U1179 code to appear?

The U1179 code can be caused by faulty wiring, a malfunctioning climate control module, a failed communication link between modules, or corrupted data in the vehicleâ€™s network.

4. Can a weak battery trigger the U1179 code?

Yes, a weak or failing battery can cause voltage issues that disrupt communication between modules, potentially triggering the U1179 code.

5. How is the U1179 code diagnosed?

Technicians will use a scan tool to check for communication issues between the climate control module and other modules, inspect wiring and connectors, and test the climate control module itself for faults.

6. Can I drive my car with the U1179 code active?

Yes, you can usually drive with this code active, but the climate control system may not function properly, leading to discomfort or reduced visibility if defrosting is impaired.

7. How do you fix the U1179 code?

Repairs may involve fixing or replacing damaged wiring, reprogramming or replacing the climate control module, or updating related software.

8. Does resetting the code fix the U1179 problem?

Resetting the code may temporarily clear it, but if the underlying issue isn't resolved, the code will likely return.

9. How much does it cost to repair the U1179 code?

Repair costs vary depending on the cause but can range from $100 for minor wiring repairs to $800 or more for module replacement and reprogramming.

10. Can the U1179 code be prevented?

Regular maintenance, including checking the vehicleâ€™s electrical system and ensuring connections are secure, can help prevent communication-related issues like the U1179 code.