AutoCodes – Pontiac – U1017 Pontiac

U1017 Pontiac 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 Pontiac 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 1,469

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

What does this mean?

What are the Possible Causes of the DTC U1017 Pontiac?

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 Pontiac?

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 Pontiac 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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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 Pontiac Code

1. What does the OBDII code U1017 mean on a Pontiac?

The U1017 code indicates a "Lost Communication With Engine Control Module" (ECM), meaning the ECM is not transmitting or receiving data properly on the communication network.

2. What are common symptoms of the U1017 code in a Pontiac?

Typical symptoms include a check engine light, engine stalling, reduced performance, transmission shifting issues, or failure to start.

3. What causes the U1017 code to appear?

The code can be caused by a faulty ECM, damaged wiring, a malfunctioning CAN (Controller Area Network) bus, or loose or corroded electrical connections.

4. Can a weak battery trigger the U1017 code in a Pontiac?

Yes, a weak or failing battery can cause communication issues, leading to the U1017 code.

5. How do I diagnose the U1017 code in a Pontiac?

Diagnose the code by inspecting the ECM connections, checking for damaged wiring, testing the CAN bus network, and ensuring the battery and alternator are functioning properly.

6. Can I drive my Pontiac with the U1017 code?

Driving with this code is not recommended, as it can lead to engine performance issues or a complete failure to start.

7. How do I fix the U1017 code on my Pontiac?

Repairs may include cleaning or tightening ECM connections, repairing damaged wiring, replacing the ECM, or addressing issues with the CAN bus network.

8. Is the U1017 code specific to Pontiacs?

No, the U1017 code can appear in other vehicle makes, but its diagnosis and repair procedures may vary depending on the vehicle.

9. Can a software issue cause the U1017 code in a Pontiac?

Yes, outdated or corrupt ECM software can cause communication problems and trigger the U1017 code.

10. How much does it cost to fix the U1017 code in a Pontiac?

The repair cost depends on the root cause, ranging from $50 for simple wiring fixes to over $1,000 for ECM replacement and reprogramming.

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