AutoCodes – Infiniti – U1010 Infiniti

U1010 Infiniti Code - CAN Communication Bus - Signal Malfunction

Quick Answer

The Controller Area Network (CAN) is a serial communication line for real-time applications. Common causes include Controller Area Network (CAN) communication harness is open or shorted, Faulty Engine Control Module (ECM), Poor harness ground 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: U1010 Infiniti indicates CAN Communication Bus - Signal Malfunction.
Common causes: Common causes include Controller Area Network (CAN) communication harness is open or shorted, Faulty Engine Control Module (ECM), Poor harness ground 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 11,648

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 Jun 28, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
Comments
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Code U1010 Infiniti Description

The Controller Area Network (CAN) is a serial communication line for real-time applications. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads the required data only.
The Diagnostic Trouble Code (DTC) sets when the Engine Control Module (ECM) is not transmitting or receiving CAN communication signals of OBD (emission-related diagnosis) for 2 seconds or more.

OBDII Code U1010 Infiniti - CAN Communication Bus - Signal Malfunction - AutoCodes.com — U1010 Infiniti Code - CAN Communication Bus - Signal Malfunction

What does this mean?

What are the Possible Causes of the DTC U1010 Infiniti?

Controller Area Network (CAN) communication harness is open or shorted
Faulty Engine Control Module (ECM)
Poor harness ground connection.

How to Fix the DTC U1010 Infiniti?

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 does this mean?

Code Tech Notes

There is a factory service bulletin for the following Infiniti models:
- 2002-2004 Infiniti I35
- 2002-2006 Infiniti Q45
- 2004-2006 Infiniti QX56
- 2003-2006 Infiniti FX
- 2003-2006 Infiniti G35
- 2003-2004 Infiniti M45
- 2006 Infiniti M
Infiniti Factory Service Bulletin Code U1010

The service bulletin suggests cleaning engine and body harness ground connection to repair the problem.
- Clean/re-tighten ECM ground connections.
- Clean/re-tighten negative battery cable body connection and battery post connection.
- If needed, clean and ensure good contact between the steering member assembly and the left side instrument stay assembly.

There is another Infiniti service bulletin with tips to diagnose the U1000 code:
Infiniti Service Bulletin Code U1010 Diagnostic Tips and Guidelines

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1010 Infiniti 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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Information for Specific Infiniti Models

U1010 2006 Infiniti G35 — CAN Communication Bus - Signal Malfunction

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.