AutoCodes – Toyota – U0122 2015 Toyota RAV4

U0122 2015 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 2015 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 227

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 2015 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 2015 Toyota RAV4 - Lost Communication with Vehicle Dynamics Control Module - AutoCodes.com — U0122 2015 Toyota RAV4 Code - Lost Communication with Vehicle Dynamics Control Module

What does this mean?

What are the Possible Causes of the DTC U0122 2015 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 2015 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 2015 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 2015 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 2015 Toyota RAV4 Code

1. What does the OBDII code U0122 on a 2015 Toyota RAV4 mean?

The U0122 code indicates a communication problem between the vehicle's onboard computer system and the Vehicle Dynamics Control Module.

2. What are the common symptoms of the U0122 code in a 2015 Toyota RAV4?

Common symptoms include the malfunction indicator light (MIL) illuminating on the dashboard, issues with the vehicle stability control system, and potential loss of traction control.

3. What are some possible causes of the U0122 code in a 2015 Toyota RAV4?

Potential causes may include damaged wiring or connectors, a faulty Vehicle Dynamics Control Module, a weak or dead battery, or issues with the CAN bus communication system.

4. How can I diagnose the U0122 code in my 2015 Toyota RAV4?

Diagnosis typically involves using an OBDII scanner to retrieve the code, checking for any other related codes, inspecting the wiring and connectors, testing the Vehicle Dynamics Control Module, and ensuring the battery is in good condition.

5. Can I continue driving my 2015 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 proper functioning of the vehicle stability control system and compromise safety.

6. How can the U0122 code in a 2015 Toyota RAV4 be repaired?

Repair options may include repairing or replacing damaged wiring or connectors, replacing the Vehicle Dynamics Control Module, addressing any battery issues, and clearing the code with an OBDII scanner.

7. Is it possible to reset the U0122 code in a 2015 Toyota RAV4 without repairs?

While clearing the code with an OBDII scanner may temporarily turn off the MIL, it is important to address the underlying issue causing the code to prevent it from reoccurring.

8. Can a DIY enthusiast fix the U0122 code in a 2015 Toyota RAV4?

Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address the U0122 code by following repair guides or tutorials specific to their vehicle.

9. Are there any recalls or technical service bulletins related to the U0122 code in a 2015 Toyota RAV4?

It is advisable to check with a Toyota dealership or refer to the manufacturer's website for any relevant recalls or technical service bulletins related to the U0122 code in the 2015 RAV4.

10. How can I prevent the U0122 code from appearing in my 2015 Toyota RAV4 in the future?

Regularly inspecting and maintaining the vehicle's electrical system, ensuring proper battery health, and addressing any warning signs promptly can help prevent the recurrence of the U0122 code in the future.