AutoCodes – Generic – U1044

U1044 Code - Engine Communication Circuit

Quick Answer

The Diagnostic Trouble Code (DTC) sets when a signal voltage of Local Interconnect Network (LIN) communication between Engine Control Module (ECM) and Generator is excessively low or excessively high. Common causes include Faulty Generator, Generator harness is open or shorted, Generator 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: U1044 indicates Engine Communication Circuit.
Common causes: Common causes include Faulty Generator, Generator harness is open or shorted, Generator 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 6,256

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
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Code U1044 Description

OBDII Code U1044 - Engine Communication Circuit - AutoCodes.com — U1044 Code - Engine Communication Circuit

What does this mean?

What are the Possible Causes of the DTC U1044?

Faulty Generator
Generator harness is open or shorted
Generator circuit poor electrical connection

How to Fix the DTC U1044?

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 U1044 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 U1044 code?

Need more information on how to fix the U1044 code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Makes

U1044 Infiniti — Engine Communication Circuit
U1044 Nissan — Engine Communication Circuit

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.