AutoCodes – Chevrolet – U1017 Chevrolet

U1017 Chevrolet Code - Lost Communication With Engine Control Module

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine Control 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: U1017 Chevrolet indicates Lost Communication With Engine Control Module.
Common causes: Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine Control 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 6,046

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 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1017 Chevrolet 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 the state of health monitoring/node alive messages. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. Once an identification number is learned by a module, it will monitor for that module node alive message. Each module on the class 2 serial data circuit is required to send a Node Alive message every 2 seconds. When no message is detected from a learned identification number for 5 seconds, a Diagnostic Trouble Code (DTC) U1017 is set.

OBDII Code U1017 Chevrolet - Lost Communication With Engine Control Module - AutoCodes.com — U1017 Chevrolet Code - Lost Communication With Engine Control Module

What does this mean?

What are the Possible Causes of the DTC U1017 Chevrolet?

Faulty Engine Control Module (ECM)
Engine Control Module harness is open or shorted
Engine Control Module circuit poor electrical connection

How to Fix the DTC U1017 Chevrolet?

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 U1017 Chevrolet 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.

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Need more information on how to fix the U1017 Chevrolet code? Get Access to Factory Service Manuals

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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 U1017 Chevrolet Code

1. What are the common symptoms of OBDII code U1017 in a Chevrolet vehicle?

- Common symptoms include engine stalling, rough idling, poor performance, and the illumination of the check engine light.

2. What are the possible causes of the U1017 code indicating lost communication with the Engine Control Module (ECM) in a Chevrolet?

- The code may be triggered by issues such as a faulty ECM, damaged wiring or connectors, a blown fuse, or a software glitch.

3. How can I diagnose the U1017 code in my Chevrolet for lost communication with the ECM?

- Diagnosis involves using an OBDII scanner to retrieve the code, checking the wiring and connectors for damage, and testing the ECM for functionality.

4. Is it safe to continue driving my Chevrolet with the U1017 code present?

- It is recommended to address the issue promptly as continued driving with communication issues with the ECM can lead to potential safety hazards and further damage to the vehicle.

5. Can I reset the U1017 code in my Chevrolet without addressing the underlying issue?

- While you can clear the code with an OBDII scanner, it is important to diagnose and repair the root cause to prevent the code from reoccurring.

6. What are some repair tips for resolving the U1017 code in a Chevrolet?

- Repair tips may include checking and repairing any damaged wiring, ensuring proper connections, replacing the ECM if necessary, and updating software as recommended by Chevrolet.

7. How much does it typically cost to repair the U1017 code related to lost communication with the ECM in a Chevrolet?

- The cost of repairs can vary depending on the specific issue, but it may range from $200 to $800 or more, including parts and labor.

8. Can a DIY enthusiast fix the U1017 code issue in a Chevrolet, or is professional help recommended?

- While some basic troubleshooting and repairs can be done by DIY enthusiasts, complex issues like ECM replacement may require professional help for proper diagnosis and repair.

9. Are there any preventive measures to avoid encountering the U1017 code in a Chevrolet?

- Regular maintenance, checking for loose connections, and addressing any electrical issues promptly can help prevent the U1017 code from occurring.

10. How long does it typically take to repair the U1017 code indicating lost communication with the ECM in a Chevrolet?

- The repair time can vary based on the exact cause of the issue, but it may take anywhere from a few hours to a full day to diagnose and fix the problem.