AutoCodes – Generic – U0424

U0424 Code - Invalid Data Received From HVAC Control Module

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module, HVAC Control Module harness is open or shorted, HVAC 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: U0424 indicates Invalid Data Received From HVAC Control Module.
Common causes: Common causes include Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module, HVAC Control Module harness is open or shorted, HVAC 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 34,926

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 11, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0424 Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. Some devices are constantly receiving information from other devices through serial data communication network. The invalid data Diagnostic Trouble Code (DTC) will be set when a receiving device detects a discrepancy in the information it receives from the Heating, Ventilation, and Air Conditioning (HVAC) Control Module causing its integrity to be questioned.

OBDII Code U0424 - Invalid Data Received From HVAC Control Module - AutoCodes.com — U0424 Code - Invalid Data Received From HVAC Control Module

What does this mean?

What are the Possible Causes of the DTC U0424?

Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module
HVAC Control Module harness is open or shorted
HVAC Control Module circuit poor electrical connection

How to Fix the DTC U0424?

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 U0424 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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Information for Specific Makes

U0424 Buick — Invalid Data Received From HVAC Control Module
U0424 Cadillac — Invalid Data Received From HVAC Control Module
U0424 Chevrolet — Invalid Data Received From HVAC Control Module
U0424 Chrysler — Invalid Data Received From HVAC Control Module
U0424 Dodge — Invalid Data Received From HVAC Control Module
U0424 Ford — Invalid Data Received From HVAC Control Module
U0424 GMC — Invalid Data Received From HVAC Control Module
U0424 Jeep — Invalid Data Received From HVAC Control Module
U0424 Lincoln — Invalid Data Received From HVAC Control Module
U0424 Mercury — Invalid Data Received From HVAC Control Module
U0424 RAM — Invalid Data Received From HVAC Control Module

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 U0424 Code

1. What are the common symptoms of OBDII code U0424?

The common symptoms of code U0424 "Invalid Data Received From HVAC Control Module" include issues with the heating, ventilation, and air conditioning system, such as inconsistent airflow, lack of temperature control, or non-functional HVAC controls.

2. What are the possible causes of OBDII code U0424?

The possible causes of code U0424 include a faulty HVAC control module, wiring or connection issues between the HVAC module and the vehicle's main computer, or a communication error between the two modules.

3. How can I diagnose OBDII code U0424?

Diagnosing code U0424 typically involves using a diagnostic scanner to retrieve the code and perform a thorough inspection of the HVAC control module, related wiring, and connections. It may also involve checking for any other related trouble codes stored in the vehicle's computer.

4. Can I still drive my vehicle with OBDII code U0424?

It is generally safe to drive your vehicle with code U0424, but it is recommended to address the issue promptly to avoid potential problems with the HVAC system's performance and overall vehicle operation.

5. How can I repair OBDII code U0424?

Repairing code U0424 may involve resetting the code using a diagnostic scanner, inspecting and repairing any damaged wiring or connections, replacing the HVAC control module if necessary, and ensuring proper communication between the HVAC module and the vehicle's main computer.

6. Are there any DIY tips for fixing OBDII code U0424?

While some basic inspections and resets can be done by DIY enthusiasts, diagnosing and repairing code U0424 may require specialized tools and expertise. It is recommended to consult a professional mechanic for a proper diagnosis and repair.

7. Will resetting the trouble codes fix OBDII code U0424 permanently?

Resetting the trouble codes may temporarily clear code U0424, but if the underlying issue with the HVAC control module or communication system is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem.

8. How much does it cost to repair OBDII code U0424?

The cost of repairing code U0424 can vary depending on the specific cause of the issue, the extent of the repairs needed, and labor rates in your area. It is advisable to get a diagnostic inspection from a qualified mechanic to receive an accurate cost estimate.

9. Can extreme weather conditions trigger OBDII code U0424?

Extreme weather conditions, such as excessive heat or cold, can potentially affect the performance of the HVAC control module and communication system, leading to the triggering of code U0424. Proper maintenance and care of the HVAC system can help prevent such issues.

10. Is OBDII code U0424 a serious problem?

While code U0424 may not directly impact the drivability of the vehicle, it can affect the comfort and functionality of the HVAC system. Addressing the issue in a timely manner is recommended to ensure proper operation of the heating, ventilation, and air conditioning components.