AutoCodes - Nissan - U1000 NISSAN

U1000 NISSAN Code - CAN Communication Line - Signal Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
What does this mean?
Table of contents
What does this mean?

|U1000 NISSAN code possible causes

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

|How do I fix the U1000 NISSAN code?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
What does this mean?

|U1000 NISSAN code tech notes

Usually, the problem is poor harness ground connection.

There is a service bulletin for the following Nissan models with U1000 code:
- 2002-2006 Nissan Maxima
- 2004-2006 Nissan Titan
- 2004-2006 Nissan Armada
- 2002-2006 Nissan Sentra
- 2005-2006 Nissan Frontier
- 2002-2006 Nissan Altima
- 2005-2006 Nissan Xterra
- 2005-2006 Nissan Pathfinder
- 2004-2006 Nissan Quest
- 2003-2006 Nissan 350Z
- 2003-2006 Nissan Murano
Nissan Factory Service Bulletin OBDII Code U1000

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.

|Cost of diagnosing the U1000 NISSAN code

Labor: 1.0

The cost of diagnosing the U1000 NISSAN code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are U1000 NISSAN code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|U1000 NISSAN code 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 U1000 Nissan - CAN Communication Line - Signal Malfunction - AutoCodes.com

|Need more information with the U1000 NISSAN code?

Need more information on how to fix the U1000 NISSAN code? Get Access to Factory Service Manuals

|U1000 NISSAN code information for specific Nissan models

|Need help with a U1000 NISSAN code?

Get the U1000 Nissan code diagnosed by a professional: Find a repair shop in your area

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|U1000 NISSAN code comments

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