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U0163 Lexus Code - Lost Communication with Navigation Control Module

Quick Answer

The U0163 diagnostic trouble code (DTC) for Lexus vehicles indicates that there is a communication problem between the vehicle's onboard computer system and the navigation control module. Common causes include Faulty wiring connections, Damaged wiring harnesses, Malfunctioning navigation control module. 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
U0163 Lexus indicates Lost Communication with Navigation Control Module.
Common causes
Common causes include Faulty wiring connections, Damaged wiring harnesses, Malfunctioning navigation control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code U0163 Lexus Description

The U0163 diagnostic trouble code (DTC) for Lexus vehicles indicates that there is a communication problem between the vehicle's onboard computer system and the navigation control module. This module is responsible for managing the navigation system, including GPS functions, map display, and route guidance. When communication is lost with this module, it can lead to various issues with the navigation system, potentially affecting the driver's ability to navigate accurately.

OBDII Code U0163 Lexus - Lost Communication with Navigation Control Module
U0163 Lexus Code - Lost Communication with Navigation Control Module

Common Causes of U0163 Lexus

  1. Faulty wiring connections
  2. Damaged wiring harnesses
  3. Malfunctioning navigation control module
  4. Software glitches in the navigation system
  5. Electrical issues in the vehicle's communication network

Symptoms of U0163 Lexus

  1. Navigation system not responding to inputs
  2. Inaccurate or missing map data
  3. Navigation screen freezing or displaying error messages
  4. Difficulty accessing route guidance
  5. Loss of GPS signal or position tracking

How to Fix U0163 Lexus

  1. Begin by conducting a thorough inspection of the wiring connections and harnesses related to the navigation control module. Look for any signs of damage, corrosion, or loose connections. Repair or replace any faulty wiring as needed.
  2. Check the navigation control module for any malfunctions or software glitches. Perform a diagnostic scan to identify any specific issues with the module. Replace the module if necessary.
  3. Reset the vehicle's onboard computer system to clear any stored error codes related to the communication problem. This may help restore proper communication with the navigation module.
  4. Test the navigation system after completing the repairs to ensure that communication is restored and that all functions are working correctly. Verify GPS signal reception, map display, and route guidance capabilities.
  5. If the issue persists, consult a professional automotive technician or dealership for further diagnosis and repair. They may have specialized tools and expertise to pinpoint the exact cause of the communication problem and provide a more comprehensive solution.

Cost to Fix U0163 Lexus

The typical repair costs for addressing a U0163 code related to lost communication with the navigation control module can vary depending on the specific cause of the issue and the extent of repairs needed. In general, parts and labor for this type of repair may range from $200 to $500 or more. This estimate includes the cost of potential replacement parts, diagnostic time, and labor charges for the repair process.

What does this mean?

Tech Notes for U0163 Lexus

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.

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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 U0163 Lexus Code

1. What are common symptoms of OBDII code U0163 in a Lexus related to the Navigation Control Module?

- Common symptoms include the navigation system not functioning properly, error messages on the display screen, and loss of GPS signal.

2. What are some possible causes of the U0163 code indicating lost communication with the Navigation Control Module in a Lexus?

- Possible causes include a faulty navigation control module, wiring issues, a blown fuse, or a software glitch in the system.

3. How can I diagnose the U0163 code in my Lexus related to the Navigation Control Module?

- A diagnostic scan tool can be used to retrieve the specific trouble codes stored in the vehicle's computer system, helping identify the root cause of the communication loss.

4. What are some repair tips for resolving the U0163 code in a Lexus indicating lost communication with the Navigation Control Module?

- Check and replace any blown fuses related to the navigation system, inspect the wiring for any damage, and reset the navigation system by disconnecting the battery for a few minutes.

5. Is it safe to continue driving my Lexus with the U0163 code showing a lost communication issue with the Navigation Control Module?

- While the vehicle may still be operational, it is recommended to address the issue promptly to ensure the proper functioning of the navigation system and prevent any potential safety concerns.

6. Can a DIY enthusiast fix the U0163 code indicating lost communication with the Navigation Control Module in a Lexus?

- Depending on the root cause of the issue, some simple repairs like checking fuses or resetting the system can be done by DIY enthusiasts. For more complex issues, it is advisable to seek professional help.

7. How much does it typically cost to repair the U0163 code related to the Navigation Control Module in a Lexus?

- The cost of repairs can vary depending on the exact cause of the communication loss. Simple fixes like replacing a fuse may cost less, while more complex issues might require professional diagnosis and repair.

8. Are there any software updates available to address the U0163 code in a Lexus with a Navigation Control Module problem?

- Checking with a Lexus dealership or authorized service center can help determine if there are any software updates or recalls related to the navigation system that could resolve the communication issue.

9. What steps should I take if the U0163 code persists in my Lexus even after attempting basic repairs for the Navigation Control Module?

- If the issue persists, it is recommended to have the vehicle inspected by a qualified technician to diagnose and repair the underlying cause of the communication problem with the navigation control module.

10. Is the U0163 code indicating lost communication with the Navigation Control Module a common issue in Lexus vehicles?

- While relatively uncommon, issues with the navigation control module leading to the U0163 code can occur in Lexus vehicles, especially in older models or vehicles with high mileage.

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