AutoCodes – Toyota – U0122 2017 Toyota RAV4

U0122 2017 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 2017 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 184

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 2017 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 2017 Toyota RAV4 - Lost Communication with Vehicle Dynamics Control Module - AutoCodes.com — U0122 2017 Toyota RAV4 Code - Lost Communication with Vehicle Dynamics Control Module

What does this mean?

What are the Possible Causes of the DTC U0122 2017 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 2017 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 2017 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 2017 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 2017 Toyota RAV4 Code

1. What are the common symptoms of OBDII code U0122 in a 2017 Toyota RAV4?

- Common symptoms include the illumination of the check engine light, ABS light, traction control light, and potential loss of communication with the Vehicle Dynamics Control Module.

2. What does the OBDII code U0122 in a 2017 Toyota RAV4 indicate?

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

3. What are some possible causes of the U0122 code in a 2017 Toyota RAV4?

- Possible causes include damaged wiring or connectors, a faulty Vehicle Dynamics Control Module, a software issue, or a malfunction in the CAN bus communication network.

4. How can I diagnose the U0122 code in my 2017 Toyota RAV4?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific code, checking the wiring and connectors for any visible damage, and testing the Vehicle Dynamics Control Module for functionality.

5. Can I still drive my 2017 Toyota RAV4 with the U0122 code present?

- It is not recommended to drive the vehicle with the U0122 code present, as it may affect the performance of the vehicle's stability control system.

6. How can I repair the U0122 code in my 2017 Toyota RAV4?

- Repair options include fixing any damaged wiring or connectors, replacing the faulty Vehicle Dynamics Control Module, updating software, or addressing any issues with the CAN bus communication network.

7. Is it possible to reset the U0122 code in a 2017 Toyota RAV4 without addressing the underlying issue?

- While you can clear the code with an OBDII scanner, it is essential to diagnose and fix the underlying problem to prevent the code from reappearing.

8. Will the U0122 code in a 2017 Toyota RAV4 cause any long-term damage if left unaddressed?

- Leaving the U0122 code unresolved can potentially lead to further issues with the vehicle's stability control system and safety features, so it is best to address it promptly.

9. How long does it typically take to repair the U0122 code in a 2017 Toyota RAV4?

- The repair time can vary depending on the exact cause of the code, but it may take anywhere from a few hours to a day to diagnose and fix the issue.

10. Can a DIY enthusiast address the U0122 code in a 2017 Toyota RAV4, or is it best left to professionals?

- While some simple checks like inspecting wiring and connectors can be done by DIY enthusiasts, diagnosing and repairing the U0122 code often requires professional expertise and specialized equipment.