AutoCodes – Generic – U1022

U1022 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: U1022 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 8,443

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 22, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1022 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 U1022 - Invalid Or Missing Data For Primary Id - AutoCodes.com — U1022 Code - Invalid Or Missing Data For Primary Id

What does this mean?

What are the Possible Causes of the DTC U1022?

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

How to Fix the DTC U1022?

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 U1022 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 U1022 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 U1022 Code

What does the OBDII code U1022 mean?

The U1022 code means there is invalid or missing data for the primary ID, typically indicating a communication issue between control modules in the vehicle.

What are the common symptoms of code U1022?

Common symptoms include a check engine light, malfunctioning electronic systems, erratic gauge behavior, or the inability of some vehicle modules to operate properly.

What causes the U1022 code to appear?

This code is often caused by faulty wiring, loose or corroded connectors, a malfunctioning control module, or issues with the vehicle’s CAN (Controller Area Network) bus system.

Can a weak battery cause the U1022 code?

Yes, a weak or failing battery can disrupt communication between modules and trigger the U1022 code.

How do I diagnose the U1022 code?

Start by checking the wiring and connectors for damage or corrosion, then use a scan tool to check the communication status of the affected modules and the vehicle’s CAN bus.

Can the U1022 code go away on its own?

If the issue is intermittent, such as a temporary wiring connection issue, the code may clear itself, but it’s recommended to investigate the root cause to prevent recurrence.

Is it safe to drive with the U1022 code?

It may be safe to drive depending on the severity of the issue, but since it can affect communication between critical modules, it’s best to address the problem promptly.

How can I fix the U1022 code?

Repairs may include cleaning or repairing wiring and connectors, reprogramming or replacing faulty modules, or addressing issues with the CAN bus network.

Can a software update fix the U1022 code?

In some cases, a software update for the affected control module can resolve communication issues causing the code.

Do I need a professional mechanic to fix the U1022 code?

While basic checks like inspecting wiring and connectors can be done at home, diagnosing and repairing module communication issues may require specialized tools and expertise, so a professional mechanic is recommended.