AutoCodes – Generic – U0075

U0075 Code - Control Module Communication Object Detection CAN Bus Off

Quick Answer

The devices connected to the object high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Check for more codes, Faulty Control Module, Control Module harness is open or shorted. 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: U0075 indicates Control Module Communication Object Detection CAN Bus Off.
Common causes: Common causes include Check for more codes, Faulty Control Module, Control Module harness is open or shorted.
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 10,779

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 Jul 19, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0075 Description

The devices connected to the object high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices when the ignition switch is in any position other than OFF. The object high speed GMLAN serial data bus uses terminating resistors that are in parallel with the object high speed GMLAN (+) and (-) circuits. The Diagnostic Trouble Code (DTC) sets when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U0075 - Control Module Communication Object Detection CAN Bus Off - AutoCodes.com — U0075 Code - Control Module Communication Object Detection CAN Bus Off

What does this mean?

What are the Possible Causes of the DTC U0075?

Check for more codes
Faulty Control Module
Control Module harness is open or shorted
Control Module circuit poor electrical connection

How to Fix the DTC U0075?

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 U0075 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 U0075 code?

Need more information on how to fix the U0075 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0075 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U0075 Buick — Control Module Communication Object Detection CAN Bus Off
U0075 Cadillac — Control Module Communication Object Detection CAN Bus Off
U0075 Chevrolet — Control Module Communication Object Detection CAN Bus Off
U0075 Chrysler — Network 2 Intermittent
U0075 Dodge — Network 2 Intermittent
U0075 GMC — Control Module Communication Object Detection CAN Bus Off
U0075 Jeep — Network 2 Intermittent
U0075 RAM — Network 2 Intermittent

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 U0075 Code

1. What are the common symptoms of OBDII code U0075?

- Common symptoms include issues with the vehicle's transmission, engine performance, and communication errors with various control modules.

2. What can cause the OBDII code U0075 to appear?

- The code U0075 is typically triggered by a malfunction in the communication network, such as a faulty control module or issues with the Controller Area Network (CAN) bus.

3. How can I diagnose the OBDII code U0075?

- Diagnosing the code U0075 usually involves using an OBDII scanner to retrieve the specific fault codes and conducting thorough inspections of the vehicle's communication network components.

4. Is it safe to drive with the OBDII code U0075 present?

- It is not recommended to drive the vehicle with the code U0075 active, as it can lead to further communication issues between control modules and potentially affect the overall performance and safety of the vehicle.

5. Can a DIY enthusiast repair the OBDII code U0075?

- Repairing the code U0075 may require advanced diagnostic tools and technical knowledge, making it more suitable for professional mechanics or technicians with experience in handling communication network problems.

6. How much does it cost to repair the OBDII code U0075?

- The cost of repairing the code U0075 can vary depending on the underlying cause, parts needed for replacement, and labor charges. It is advisable to obtain quotes from different repair shops for an accurate estimate.

7. Are there any common fixes for the OBDII code U0075?

- Common fixes for the code U0075 may include checking and repairing wiring connections, replacing faulty control modules, updating software, or reprogramming modules to restore proper communication on the CAN bus.

8. Can a low battery voltage trigger the OBDII code U0075?

- Yes, a low battery voltage or electrical issues in the vehicle can sometimes lead to communication faults and trigger the code U0075. It is essential to ensure the battery and electrical system are in good condition.

9. Will disconnecting the battery reset the OBDII code U0075?

- Disconnecting the battery may reset the code temporarily, but if the underlying issue causing the code U0075 is not addressed, it is likely to reappear once the vehicle is driven and the communication problem persists.

10. How soon should I address the OBDII code U0075 once it appears?

- It is recommended to address the OBDII code U0075 promptly to prevent further communication issues between control modules and avoid potential damage to the vehicle's systems.