AutoCodes – Generic – U1224

U1224 Code - Invalid Or Missing Data For Primary Id

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: U1224 indicates Invalid Or Missing Data For Primary Id.
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 5,078

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 May 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1224 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 U1224 - Invalid Or Missing Data For Primary Id - AutoCodes.com — U1224 Code - Invalid Or Missing Data For Primary Id

What does this mean?

What are the Possible Causes of the DTC U1224?

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

How to Fix the DTC U1224?

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 U1224 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 U1224 code?

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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 U1224 Code

What does OBDII code U1224 mean?

Code U1224 indicates "Invalid or Missing Data for Primary ID," which typically points to communication issues between control modules in the vehicle.

What are the common symptoms of code U1224?

Symptoms may include warning lights on the dashboard, failure of certain electronic systems, or intermittent loss of communication between modules.

What causes code U1224 to appear?

Common causes include faulty wiring or connectors, issues with the CAN bus network, a malfunctioning control module, or software glitches.

Can code U1224 cause drivability issues?

While it may not directly impact drivability, it can affect electronic systems critical for optimal vehicle performance.

How do you diagnose code U1224?

Diagnosis involves scanning the vehicle with an OBDII tool, checking for additional codes, inspecting wiring and connectors, and testing communication signals between modules.

Can a faulty control module trigger code U1224?

Yes, a malfunctioning control module can fail to send or receive proper data, resulting in this code.

Is code U1224 a common issue in vehicles?

This code is less common than other OBDII codes but can occur in vehicles with complex electronic systems.

How can wiring issues lead to code U1224?

Damaged or corroded wiring can disrupt communication signals between control modules, triggering this code.

What repairs can fix code U1224?

Repairs may include fixing or replacing damaged wiring, reprogramming or replacing malfunctioning modules, and ensuring proper connections in the CAN bus network.

Can clearing code U1224 solve the problem?

Clearing the code may temporarily resolve the issue, but the underlying problem must be diagnosed and repaired to prevent recurrence.