AutoCodes – Toyota – U0124 2017 Toyota RAV4

U0124 2017 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 2017 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.

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Code Popularity 789

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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
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Code U0124 2017 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 2017 Toyota RAV4 - Lost Communication with Lateral Acceleration Sensor Module - AutoCodes.com — U0124 2017 Toyota RAV4 Code - Lost Communication with Lateral Acceleration Sensor Module

What does this mean?

What are the Possible Causes of the DTC U0124 2017 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 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 U0124 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.

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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 U0124 2017 Toyota RAV4 Code

1. What does the OBDII code U0124 for a 2017 Toyota RAV4 mean?

The code U0124 indicates a communication problem between the vehicle's onboard computer system and the lateral acceleration sensor module.

2. What are the common symptoms of a U0124 code in a 2017 Toyota RAV4?

Common symptoms include the illumination of the check engine light, stability control system malfunction, and potential loss of traction control features.

3. What are the possible causes of a U0124 code in a 2017 Toyota RAV4?

Potential causes of the U0124 code include a faulty lateral acceleration sensor module, damaged wiring or connectors, software issues, or a malfunctioning onboard computer system.

4. How can I diagnose a U0124 code in my 2017 Toyota RAV4?

Diagnosing a U0124 code involves using an OBDII scanner to retrieve the code, inspecting the lateral acceleration sensor module and its connections, and conducting a thorough visual inspection of related components.

5. Can I drive my 2017 Toyota RAV4 with a U0124 code?

It is not recommended to drive your vehicle with a U0124 code, as it may compromise the stability control system and traction control features, leading to potential safety risks.

6. How can I repair a U0124 code in my 2017 Toyota RAV4?

Repairing a U0124 code may involve replacing the lateral acceleration sensor module, repairing or replacing damaged wiring or connectors, updating software, or addressing any underlying issues with the onboard computer system.

7. Are there any DIY tips for fixing a U0124 code in a 2017 Toyota RAV4?

While some basic inspections like checking for loose connections or damaged wiring can be done by DIY enthusiasts, diagnosing and repairing complex issues related to the U0124 code may require professional expertise.

8. Will a U0124 code reset itself in a 2017 Toyota RAV4?

In some cases, the U0124 code may reset itself if the underlying issue is temporary. However, it is advisable to diagnose and address the root cause to prevent the code from reoccurring.

9. Can a U0124 code affect the overall performance of a 2017 Toyota RAV4?

Yes, a U0124 code can impact the performance of your vehicle by affecting the stability control system and traction control features, potentially compromising handling and safety.

10. How much does it cost to fix a U0124 code in a 2017 Toyota RAV4?

The cost of fixing a U0124 code can vary depending on the underlying issue, parts needed for replacement, and labor costs. It is recommended to consult a professional mechanic for an accurate estimate.