AutoCodes – Generic – U1035

U1035 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: U1035 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 14,287

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 U1035 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 U1035 - Invalid Or Missing Data For Primary Id - AutoCodes.com — U1035 Code - Invalid Or Missing Data For Primary Id

What does this mean?

What are the Possible Causes of the DTC U1035?

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

How to Fix the DTC U1035?

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 U1035 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 U1035 code?

Need more information on how to fix the U1035 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1035 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 U1035 Code

1. What are the common symptoms of OBDII code U1035?

- Common symptoms include issues with engine performance, such as rough idling, stalling, or reduced power. The check engine light may also illuminate on the dashboard.

2. What are the possible causes of OBDII code U1035?

- The code U1035 can be triggered by faulty wiring or connectors, issues with the primary ID module, or communication problems within the vehicle's network.

3. How can I diagnose OBDII code U1035?

- Diagnosing code U1035 usually involves using a professional OBDII scanner to retrieve the code and then conducting a thorough inspection of the primary ID module, wiring, and connectors for any faults.

4. Can a DIY enthusiast repair OBDII code U1035?

- Repairing code U1035 may require advanced diagnostic skills and specialized tools. It is recommended to consult with a professional mechanic to accurately diagnose and repair the issue.

5. Is it safe to continue driving with OBDII code U1035 present?

- While the vehicle may still be operable with code U1035, it is not recommended to ignore the issue. Continuing to drive with this code present can potentially lead to further damage to the vehicle.

6. How much does it typically cost to repair OBDII code U1035?

- The cost of repairing code U1035 can vary depending on the underlying cause of the issue. It is advisable to obtain a few quotes from different mechanics to determine the most cost-effective solution.

7. Can a dead battery trigger OBDII code U1035?

- A dead or low battery voltage can sometimes cause communication errors within the vehicle's network, leading to code U1035. Ensuring the battery is fully charged and in good condition is recommended.

8. Are there any common vehicles prone to experiencing OBDII code U1035?

- While this code can occur in various vehicles, some models with complex network systems or older wiring may be more prone to experiencing issues related to code U1035.

9. How long does it take to repair OBDII code U1035?

- The repair time for code U1035 can vary depending on the exact cause of the issue and the availability of replacement parts. Some repairs may be completed within a few hours, while more complex issues may take longer.

10. Can resetting the OBDII system clear code U1035?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear. It is essential to diagnose and repair the root cause of the problem.