AutoCodes – Generic – U0163

U0163 Code - Lost Communication with Navigation 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 Navigation Control Module, Navigation 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: U0163 indicates Lost Communication with Navigation Control Module.
Common causes: Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Navigation Control Module, Navigation 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.

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Code Popularity 14,429

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 U0163 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 Navigation Control Module has not been received.

OBDII Code U0163 - Lost Communication with Navigation Control Module - AutoCodes.com — U0163 Code - Lost Communication with Navigation Control Module

What does this mean?

What are the Possible Causes of the DTC U0163?

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

How to Fix the DTC U0163?

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 U0163 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 U0163 code?

Need more information on how to fix the U0163 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0163 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U0163 Lexus — Lost Communication with Navigation Control Module
U0163 Toyota — Lost Communication with Navigation Control Module

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 Code

1. What are the common symptoms of OBDII code U0163 (Lost Communication with Navigation Control Module)?

- Common symptoms include a non-functional navigation system, loss of GPS signal, and in some cases, issues with other vehicle systems like the audio or climate control.

2. What are the possible causes of the U0163 code?

- The U0163 code can be triggered by a faulty navigation control module, damaged wiring or connectors, software issues, or a malfunction in the communication network.

3. How can I diagnose the U0163 code?

- Diagnosing the U0163 code involves checking the navigation control module for power and ground, inspecting the wiring for damage, and using a scan tool to retrieve additional codes and data related to the communication issue.

4. Can I still drive my vehicle with the U0163 code?

- In most cases, it is safe to drive the vehicle with the U0163 code, especially if no other critical systems are affected. However, it is recommended to address the issue promptly to avoid potential complications.

5. How can I repair the U0163 code?

- Repairing the U0163 code may involve repairing or replacing the navigation control module, fixing damaged wiring or connectors, updating software, or resetting the communication network.

6. Will resetting the U0163 code make it go away permanently?

- Resetting the U0163 code may clear it temporarily, but if the underlying issue is not addressed, the code is likely to return. It is important to diagnose and repair the root cause of the communication problem.

7. Can a DIY enthusiast fix the U0163 code?

- DIY enthusiasts with automotive repair experience and access to necessary tools like a scan tool and wiring diagrams may be able to diagnose and repair the U0163 code. However, complex issues may require professional assistance.

8. How much does it cost to repair the U0163 code?

- The cost of repairing the U0163 code can vary depending on the underlying cause, parts needed for replacement, labor charges, and whether the repair is done at a dealership or an independent mechanic. Costs can range from a few hundred to over a thousand dollars.

9. Will the U0163 code cause my vehicle to fail an emissions test?

- The U0163 code itself is not directly related to emissions, so it should not cause your vehicle to fail an emissions test. However, it is still important to address the code to ensure proper functioning of the affected systems.

10. How soon should I address the U0163 code once it appears?

- It is recommended to address the U0163 code as soon as possible to prevent further issues with the navigation system and other related systems. Ignoring the code could lead to more significant problems down the line.