AutoCodes – Nissan – U0122 Nissan

U0122 Nissan Code - Lost Communication With Vehicle Dynamics Control Module

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Faulty Vehicle Dynamics Control Module, Vehicle Dynamics Control Module harness is open or shorted, Vehicle Dynamics 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: U0122 Nissan indicates Lost Communication With Vehicle Dynamics Control Module .
Common causes: Common causes include Faulty Vehicle Dynamics Control Module, Vehicle Dynamics Control Module harness is open or shorted, Vehicle Dynamics 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 5,067

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 06, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0122 Nissan Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. CAN bus uses two dedicated wires for communication. The wires are called CAN high and CAN low. When the CAN bus is in idle mode, both lines carry 2.5V. When data bits are being transmitted, the CAN high line goes to 3.75V, and the CAN low drops to 1.25V, thereby generating a 2.5V differential between the lines. Since communication relies on a voltage differential between the two bus lines, the CAN bus is NOT sensitive to inductive spikes, electrical fields, or other noise. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Vehicle Dynamics Control Module has not been received.

OBDII Code U0122 Nissan - Lost Communication With Vehicle Dynamics Control Module - AutoCodes.com — U0122 Nissan Code - Lost Communication With Vehicle Dynamics Control Module

What does this mean?

What are the Possible Causes of the DTC U0122 Nissan?

Faulty Vehicle Dynamics Control Module
Vehicle Dynamics Control Module harness is open or shorted
Vehicle Dynamics Control Module circuit poor electrical connection

How to Fix the DTC U0122 Nissan?

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 U0122 Nissan 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 U0122 Nissan Code

1. What does the OBDII code U0122 for Nissan mean?

The code U0122 indicates a communication problem between the vehicle's control module and the Vehicle Dynamics Control (VDC) module.

2. What are the common symptoms of U0122 code in a Nissan vehicle?

Common symptoms include the VDC warning light illuminated on the dashboard, loss of stability control, and potential issues with the ABS system.

3. What are the possible causes of the U0122 code in a Nissan?

Possible causes of the U0122 code include damaged wiring or connectors, a faulty VDC module, issues with the CAN bus communication system, or a malfunctioning control module.

4. How can I diagnose the U0122 code in my Nissan?

Diagnosing the U0122 code typically involves conducting a thorough inspection of the wiring and connectors related to the VDC module, checking for any visible damage or corrosion, and using a diagnostic scanner to communicate with the modules.

5. Can I continue driving my Nissan with the U0122 code present?

While the vehicle may still be operable with the U0122 code, it is important to address the issue promptly to ensure the proper functioning of the VDC system and overall vehicle safety.

6. How can I repair the U0122 code in my Nissan?

Repairing the U0122 code often involves fixing any damaged wiring or connectors, replacing the faulty VDC module if necessary, and clearing the error codes with a diagnostic tool.

7. Is the U0122 code a serious issue in a Nissan vehicle?

The U0122 code should be taken seriously as it can affect the performance of the vehicle's stability control system, potentially compromising safety in certain driving conditions.

8. Can a DIY enthusiast fix the U0122 code in a Nissan?

While some basic troubleshooting steps can be performed by DIY enthusiasts, diagnosing and repairing the U0122 code may require specialized tools and expertise, so it is recommended to consult a professional mechanic.

9. How much does it cost to repair the U0122 code in a Nissan?

The cost of repairing the U0122 code can vary depending on the specific cause of the issue, the extent of the repairs needed, and the labor rates of the repair shop. It is advisable to obtain quotes from multiple mechanics for an accurate estimate.

10. Will resetting the U0122 code make it go away permanently?

Simply resetting the U0122 code without addressing the underlying issue will not make it go away permanently. It is crucial to diagnose and repair the root cause of the problem to prevent the code from reoccurring.