AutoCodes – Lexus – U0151 Lexus

U0151 Lexus 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 Lexus 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.

Save to My Repairs My Repairs

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

Code Popularity 513

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
Add Comment

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

Code U0151 Lexus 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 Lexus - Lost Communication with Airbag ECU - AutoCodes.com — U0151 Lexus Code - Lost Communication with Airbag ECU

What does this mean?

What are the Possible Causes of the DTC U0151 Lexus?

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 Lexus?

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 Lexus 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 U0151 Lexus code?

Need more information on how to fix the U0151 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0151 Lexus 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 U0151 Lexus Code

1. What are the common symptoms of OBDII code U0151 (Lost Communication with Airbag ECU) in a Lexus?

- Common symptoms include the airbag warning light illuminating on the dashboard, loss of communication with the airbag control module, and potential issues with the airbag system's functionality.

2. What are some possible causes of the U0151 code in a Lexus?

- Potential causes of the U0151 code can include damaged wiring or connectors, a faulty airbag control module, a blown fuse related to the airbag system, or issues with the vehicle's electronic control unit.

3. How can I diagnose the U0151 code in my Lexus related to the airbag system?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the wiring and connectors for damage, checking the airbag control module for proper connection, and testing related fuses for continuity.

4. Is it safe to drive my Lexus with the U0151 code (Lost Communication with Airbag ECU)?

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

5. How can I clear the U0151 code in my Lexus after repairing the issue?

- Once the underlying issue causing the U0151 code is resolved, you can clear the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to reset the system.

6. Can I repair the U0151 code in my Lexus by myself, or do I need to visit a professional mechanic?

- While some simple causes like loose connections or blown fuses can be addressed by DIY enthusiasts, diagnosing and repairing complex issues related to the airbag system may require the expertise of a professional mechanic.

7. Are there any safety precautions I should take when working on the airbag system in my Lexus?

- It is crucial to disconnect the vehicle's battery and wait for at least 10-15 minutes before working on the airbag system to prevent accidental deployment, as airbags are sensitive to electrical interference.

8. What are the potential risks of ignoring the U0151 code in my Lexus?

- Ignoring the U0151 code can lead to a compromised airbag system, increasing the risk of injury in the event of a collision as the airbags may not deploy or function properly.

9. How much does it typically cost to repair the U0151 code related to the airbag system in a Lexus?

- The cost of repairing the U0151 code can vary depending on the underlying cause. Simple fixes like reconnecting a loose wire may be inexpensive, while replacing a faulty airbag control module can be more costly.

10. Can the U0151 code in a Lexus be intermittent, or is it typically a persistent issue?

- The U0151 code can be intermittent in some cases, occurring sporadically due to loose connections or intermittent faults. However, it is essential to address the issue promptly to ensure the proper functioning of the airbag system.