AutoCodes – Toyota – U0124 2018 Toyota RAV4

U0124 2018 Toyota RAV4 Code - Lost Communication with Lateral Acceleration Sensor Module

Quick Answer

The Controller Area Network (CAN) is a standard bus system in vehicles that enables the connection of automotive devices without the need for a host computer. Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Lateral Acceleration Sensor Module, Lateral Acceleration Sensor Module harness is open or shorted. 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: U0124 2018 Toyota RAV4 indicates Lost Communication with Lateral Acceleration Sensor Module.
Common causes: Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Lateral Acceleration Sensor Module, Lateral Acceleration Sensor Module harness is open or shorted.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 375

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 25, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U0124 2018 Toyota RAV4 Description

The Controller Area Network (CAN) is a standard bus system in vehicles that enables the connection of automotive devices without the need for a host computer. The exchange of operating information and commands among devices is facilitated by pre-programmed information about the required message exchange on the serial data circuits. Communication is carried out using two dedicated wires, known as CAN high and CAN low, with both lines carrying 2.5V when the CAN bus is in idle mode. During the transmission of data bits, the CAN high line increases to 3.75V while the CAN low drops to 1.25V, creating 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 Lateral Acceleration Sensor Module has not been received.

OBDII Code U0124 2018 Toyota RAV4 - Lost Communication with Lateral Acceleration Sensor Module - AutoCodes.com — U0124 2018 Toyota RAV4 Code - Lost Communication with Lateral Acceleration Sensor Module

What does this mean?

What are the Possible Causes of the DTC U0124 2018 Toyota RAV4?

Faulty Controller Area Network (CAN) Communication System
Faulty Lateral Acceleration Sensor Module
Lateral Acceleration Sensor Module harness is open or shorted
Lateral Acceleration Sensor Module circuit poor electrical connection

How to Fix the DTC U0124 2018 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 U0124 2018 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 U0124 2018 Toyota RAV4 code?

Need more information on how to fix the U0124 2018 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0124 2018 Toyota RAV4 code diagnosed by a professional: Find a repair shop in your area

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 U0124 2018 Toyota RAV4 Code

1. What are the common symptoms of OBDII code U0124 in a 2018 Toyota RAV4?

- Common symptoms include the ABS warning light coming on, traction control issues, erratic or non-functional speedometer, and potential loss of stability control.

2. What does the OBDII code U0124 indicating "Lost Communication with Lateral Acceleration Sensor Module" mean in a 2018 Toyota RAV4?

- This code means that the vehicle's onboard computer is unable to communicate with the lateral acceleration sensor module, which can impact the vehicle's stability and safety systems.

3. What are the possible causes of OBDII code U0124 in a 2018 Toyota RAV4?

- Possible causes include a faulty lateral acceleration sensor module, damaged wiring or connectors, a malfunctioning ABS module, or issues with the vehicle's CAN bus communication network.

4. How can I diagnose the OBDII code U0124 in a 2018 Toyota RAV4?

- Diagnosing this code typically involves using a professional OBDII scanner to retrieve the specific trouble codes, inspecting the lateral acceleration sensor module and its connections, and checking for any visible signs of damage.

5. Can I drive my 2018 Toyota RAV4 with the OBDII code U0124 present?

- It is not recommended to drive the vehicle with this code present, as it can affect the stability and safety systems of the vehicle, potentially compromising your safety on the road.

6. How can I repair the OBDII code U0124 in a 2018 Toyota RAV4?

- Repairing this code may involve replacing the lateral acceleration sensor module, repairing any damaged wiring or connectors, resetting the ABS control module, or addressing any issues with the CAN bus communication network.

7. Is it possible to reset the OBDII code U0124 in a 2018 Toyota RAV4 without fixing the underlying issue?

- While you can clear the code temporarily with an OBDII scanner, it is crucial to address the root cause of the problem to prevent the code from reoccurring and ensure the vehicle's safety systems are functioning correctly.

8. Can a DIY enthusiast fix the OBDII code U0124 in a 2018 Toyota RAV4?

- While some basic troubleshooting steps can be performed by a knowledgeable DIY enthusiast, diagnosing and repairing this code often requires specialized tools and expertise, making it advisable to consult a professional mechanic.

9. How much does it cost to fix the OBDII code U0124 in a 2018 Toyota RAV4?

- The cost of fixing this code can vary depending on the specific cause of the issue, the parts needed for repair, and labor costs. It is recommended to obtain quotes from reputable repair shops for an accurate estimate.

10. Are there any recalls or technical service bulletins related to the OBDII code U0124 in a 2018 Toyota RAV4?

- It is advisable to check with Toyota dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls or technical service bulletins related to this specific OBDII code in the 2018 Toyota RAV4.