AutoCodes – Toyota – U0122 2014 Toyota RAV4

U0122 2014 Toyota RAV4 Code - Lost Communication with Vehicle Dynamics Control Module

Quick Answer

The Engine Control Module (ECM) and Driving Support ECU Assembly to communicate signals with each sensor and ECU via Controller Area Network (CAN) communication. Common causes include Faulty Skid Control ECU (Brake Actuator Assembly), Skid Control ECU harness is open or shorted, Skid Control ECU 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 2014 Toyota RAV4 indicates Lost Communication with Vehicle Dynamics Control Module.
Common causes: Common causes include Faulty Skid Control ECU (Brake Actuator Assembly), Skid Control ECU harness is open or shorted, Skid Control ECU 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 1,632

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 Mar 22, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U0122 2014 Toyota RAV4 Description

The Engine Control Module (ECM) and Driving Support ECU Assembly to communicate signals with each sensor and ECU via Controller Area Network (CAN) communication. If there are any malfunctions in the communication circuit, one or more CAN communication system Diagnostic Trouble Codes (DTC) are output.

OBDII Code U0122 2014 Toyota RAV4 - Lost Communication with Vehicle Dynamics Control Module - AutoCodes.com — U0122 2014 Toyota RAV4 Code - Lost Communication with Vehicle Dynamics Control Module

What does this mean?

What are the Possible Causes of the DTC U0122 2014 Toyota RAV4?

Faulty Skid Control ECU (Brake Actuator Assembly)
Skid Control ECU harness is open or shorted
Skid Control ECU circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC U0122 2014 Toyota RAV4?

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

When there are problems with the way different systems in a vehicle communicate with each other using a technology called Controller Area Network (CAN) communication, Diagnostic Trouble Codes (DTC) are displayed. These codes can be caused by issues with the main bus or branch of the communication network, or with the Electronic Control Units (ECUs) and sensors that make up the different systems. If you see code for both the CAN communication problems and internal or power source problems at the same time, you should focus on fixing the internal or power source problems first.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U0122 2014 Toyota RAV4 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 U0122 2014 Toyota RAV4 code?

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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 2014 Toyota RAV4 Code

1. What does the OBDII code U0122 for a 2014 Toyota RAV4 mean?

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

2. What are the common symptoms of U0122 in a Toyota RAV4?

Common symptoms include the traction control and stability control lights coming on, loss of traction control functionality, and potential issues with the vehicle's overall stability and handling.

3. What are the possible causes of the U0122 code in a 2014 Toyota RAV4?

The U0122 code can be triggered by issues such as a faulty VDC module, damaged wiring or connectors, a failed ECM, or a communication network problem within the vehicle.

4. How do I diagnose the U0122 code in my Toyota RAV4?

Diagnosing the U0122 code typically involves using a diagnostic scanner to retrieve the code, checking the VDC module for proper functioning, inspecting wiring for damage, and testing communication between modules.

5. Can I still drive my Toyota RAV4 with the U0122 code present?

It is not recommended to drive the vehicle with the U0122 code active, as it may affect the vehicle's stability control system and compromise safety.

6. How can I repair the U0122 code in my 2014 Toyota RAV4?

Repairing the U0122 code may involve replacing a faulty VDC module, repairing damaged wiring or connectors, reprogramming modules, or seeking assistance from a professional mechanic.

7. Will resetting the trouble codes make the U0122 code disappear?

Resetting the trouble codes may temporarily clear the U0122 code, but it is likely to reappear if the underlying issue causing the communication problem is not addressed.

8. How much does it cost to fix the U0122 code in a Toyota RAV4?

The cost of fixing the U0122 code can vary depending on the specific cause of the issue, parts required for repair, labor costs, and whether you choose to repair it yourself or seek professional help.

9. Can a DIY enthusiast fix the U0122 code in a Toyota RAV4?

Depending on your technical skills and access to tools, a knowledgeable DIY enthusiast may be able to diagnose and repair the U0122 code in a Toyota RAV4, especially for tasks like checking wiring connections.

10. How urgent is it to address the U0122 code in a Toyota RAV4?

It is important to address the U0122 code promptly to ensure the proper functioning of the vehicle's stability control system and avoid potential safety hazards while driving.