AutoCodes – Lexus – U0327 Lexus

U0327 Lexus Code - Lost Communication with Vehicle Security Control 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 Vehicle Security Control Module, Vehicle Security Control 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: U0327 Lexus indicates Lost Communication with Vehicle Security Control Module.
Common causes: Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Vehicle Security Control Module, Vehicle Security Control 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 741

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 U0327 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 Vehicle Security Control Module has not been received.

OBDII Code U0327 Lexus - Lost Communication with Vehicle Security Control Module - AutoCodes.com — U0327 Lexus Code - Lost Communication with Vehicle Security Control Module

What does this mean?

What are the Possible Causes of the DTC U0327 Lexus?

Faulty Controller Area Network (CAN) Communication System
Faulty Vehicle Security Control Module
Vehicle Security Control Module harness is open or shorted
Vehicle Security Control Module circuit poor electrical connection

How to Fix the DTC U0327 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 U0327 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 U0327 Lexus code?

Need more information on how to fix the U0327 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0327 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 U0327 Lexus Code

1. What are the common symptoms of OBDII code U0327 in a Lexus indicating lost communication with the Vehicle Security Control Module?

- Common symptoms include issues with the vehicle's security system, such as the alarm not working properly or the key fob not functioning correctly.

2. What are the potential causes of the U0327 code in a Lexus?

- The U0327 code can be triggered by a faulty Vehicle Security Control Module, damaged wiring or connectors, or a communication error within the vehicle's network.

3. How can I diagnose the U0327 code in my Lexus?

- Diagnosing the U0327 code typically involves using a professional OBDII scanner to retrieve the specific codes stored in the vehicle's computer system and conducting a thorough inspection of the security control module and related wiring.

4. Can I still drive my Lexus with the U0327 code present?

- It is not recommended to drive your Lexus with the U0327 code active, as it can lead to potential security system malfunctions that may affect the safety and security of the vehicle.

5. What are some repair tips for fixing the U0327 code in a Lexus?

- Repairing the U0327 code often involves checking and repairing any damaged wiring or connectors related to the Vehicle Security Control Module, as well as potentially replacing the module itself if it is found to be faulty.

6. Is it necessary to visit a dealership for repairs related to the U0327 code in a Lexus?

- While visiting a dealership with specialized diagnostic equipment is recommended for accurate diagnosis and repair of the U0327 code, independent auto repair shops with experience in Lexus vehicles may also be able to address the issue.

7. How much does it typically cost to repair the U0327 code in a Lexus?

- The cost of repairing the U0327 code can vary depending on the specific cause of the issue, but it may range from a couple of hundred dollars for simple wiring repairs to over a thousand dollars if the Vehicle Security Control Module needs to be replaced.

8. Can the U0327 code be triggered by other issues unrelated to the Vehicle Security Control Module?

- While the U0327 code is primarily associated with communication problems with the Vehicle Security Control Module, it can also be triggered by issues with the CAN bus network or other related modules in the vehicle.

9. Will resetting the OBDII codes clear the U0327 code in a Lexus?

- Resetting the OBDII codes may temporarily clear the U0327 code, but if the underlying issue causing the communication error with the Vehicle Security Control Module is not addressed, the code is likely to reappear.

10. How can I prevent the U0327 code from recurring in my Lexus?

- Regular maintenance and inspection of the vehicle's wiring, connectors, and modules, as well as addressing any security system issues promptly, can help prevent the U0327 code from recurring in your Lexus.