AutoCodes – Generic – U1076

U1076 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: U1076 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 5,087

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 U1076 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 U1076 - Invalid Or Missing Data For Primary Id - AutoCodes.com — U1076 Code - Invalid Or Missing Data For Primary Id

What does this mean?

What are the Possible Causes of the DTC U1076?

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

How to Fix the DTC U1076?

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 U1076 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 U1076 code?

Need more information on how to fix the U1076 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1076 code diagnosed by a professional: Find a repair shop in your area

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 U1076 Code

1. What are common symptoms of OBDII code U1076?

- Common symptoms include illuminated check engine light, issues with vehicle performance, and difficulty starting the vehicle.

2. What could cause the OBDII code U1076 to appear?

- The code may be triggered by a faulty electronic control module (ECM), wiring issues, or a communication error between modules in the vehicle.

3. How can I diagnose the underlying issue for code U1076?

- To diagnose the issue, a professional diagnostic scan tool is needed to communicate with the vehicle's onboard computer system and retrieve specific error codes for further analysis.

4. Can I repair the U1076 code on my own?

- Repairing the U1076 code may require advanced automotive knowledge and specialized tools. It is recommended to seek assistance from a qualified mechanic for proper diagnosis and repair.

5. Is it safe to continue driving with the U1076 code present?

- It is not recommended to continue driving with the U1076 code illuminated, as it may indicate potential issues that could affect the vehicle's performance and safety.

6. How much does it typically cost to repair the U1076 code?

- Repair costs for the U1076 code can vary depending on the underlying cause of the issue. It is best to consult with a mechanic for a proper diagnosis and cost estimate.

7. Can resetting the check engine light resolve the U1076 code?

- Resetting the check engine light may temporarily turn off the warning indicator, but it will not address the root cause of the U1076 code. It is important to diagnose and repair the underlying issue.

8. Are there common vehicles prone to experiencing the U1076 code?

- The U1076 code can potentially occur in various vehicle makes and models, especially those equipped with complex electronic control systems.

9. What steps should I take if the U1076 code keeps reoccurring?

- If the U1076 code keeps reappearing after being cleared, it is crucial to have a thorough inspection conducted by a professional mechanic to identify and address the persistent issue.

10. Can a low battery voltage trigger the U1076 code?

- Yes, a low battery voltage can sometimes lead to communication errors between modules in the vehicle, potentially triggering the U1076 code. It is advisable to ensure the vehicle's battery is in good condition.