AutoCodes – Toyota – U0151 2017 Toyota RAV4

U0151 2017 Toyota RAV4 Code - Lost Communication with Airbag ECU

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 Airbag ECU, Airbag ECU 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: U0151 2017 Toyota RAV4 indicates Lost Communication with Airbag ECU.
Common causes: Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Airbag ECU, Airbag ECU 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 401

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 27, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U0151 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 Airbag ECU has not been received.

OBDII Code U0151 2017 Toyota RAV4 - Lost Communication with Airbag ECU - AutoCodes.com — U0151 2017 Toyota RAV4 Code - Lost Communication with Airbag ECU

What does this mean?

What are the Possible Causes of the DTC U0151 2017 Toyota RAV4?

Faulty Controller Area Network (CAN) Communication System
Faulty Airbag ECU
Airbag ECU harness is open or shorted
Airbag ECU circuit poor electrical connection

How to Fix the DTC U0151 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 U0151 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 U0151 2017 Toyota RAV4 Code

1. What does the OBDII code U0151 on a 2017 Toyota RAV4 mean?

The code U0151 indicates a "Lost Communication with Airbag ECU" error in the vehicle's onboard diagnostics system.

2. What are the common symptoms of a U0151 code in a 2017 Toyota RAV4?

Common symptoms of a U0151 code may include the airbag warning light illuminating on the dashboard, loss of communication with the airbag control module, and potential issues with airbag deployment.

3. What are the possible causes of a U0151 code in a 2017 Toyota RAV4?

Possible causes of a U0151 code include faulty wiring or connections between the airbag electronic control unit (ECU) and the vehicle's onboard computer, a malfunctioning airbag ECU, or a communication network issue.

4. How can I diagnose a U0151 code in my 2017 Toyota RAV4?

Diagnosing a U0151 code typically involves using a professional OBDII scanner to retrieve the specific error codes, checking the wiring and connections to the airbag ECU, and testing the communication network for faults.

5. Can I still drive my 2017 Toyota RAV4 with a U0151 code?

It is not recommended to drive your vehicle with a U0151 code as it indicates a potential issue with the airbag system, which is crucial for safety in the event of a collision.

6. How can I repair a U0151 code in my 2017 Toyota RAV4?

Repairing a U0151 code may involve checking and repairing any damaged wiring or connections, replacing the faulty airbag ECU, or addressing any communication network issues in the vehicle.

7. Do I need special tools to fix a U0151 code in my 2017 Toyota RAV4?

While basic tools may be sufficient for inspecting wiring and connections, diagnosing and repairing a U0151 code may require a professional OBDII scanner and specialized knowledge of airbag systems.

8. Can a DIY enthusiast fix a U0151 code in a 2017 Toyota RAV4?

Depending on the level of expertise and access to tools, a DIY enthusiast may be able to diagnose and repair simple causes of a U0151 code, but complex issues may require professional assistance.

9. Will a U0151 code reset itself in a 2017 Toyota RAV4?

A U0151 code may not reset itself until the underlying issue with the communication between the airbag ECU and the vehicle's computer is resolved and the error codes are cleared using an OBDII scanner.

10. How much can I expect to pay to fix a U0151 code in my 2017 Toyota RAV4?

The cost to fix a U0151 code can vary depending on the specific cause of the issue. It is advisable to consult a professional technician for an accurate diagnosis and repair estimate.