AutoCodes – Generic – U2023

U2023 Code - Fault Received From External Node

Quick Answer

The Diagnostic Trouble Code (DTC) will set when the Instrument Cluster (IC) Module fault received from an external node or Anti-Lock Brake System (ABS) Module fault received from the external node. Common causes include Faulty Anti-Lock Brake System (ABS) Module, Anti-Lock Brake System Module harness is open or shorted, Anti-Lock Brake System Module circuit poor electrical connection. 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: U2023 indicates Fault Received From External Node.
Common causes: Common causes include Faulty Anti-Lock Brake System (ABS) Module, Anti-Lock Brake System Module harness is open or shorted, Anti-Lock Brake System Module circuit poor electrical connection.
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 24,500

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 Jun 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2023 Description

The Diagnostic Trouble Code (DTC) will set when the Instrument Cluster (IC) Module fault received from an external node or Anti-Lock Brake System (ABS) Module fault received from the external node.

OBDII Code U2023 - Fault Received From External Node - AutoCodes.com — U2023 Code - Fault Received From External Node

What does this mean?

What are the Possible Causes of the DTC U2023?

Faulty Anti-Lock Brake System (ABS) Module
Anti-Lock Brake System Module harness is open or shorted
Anti-Lock Brake System Module circuit poor electrical connection
Faulty Instrument Cluster (IC) Module

How to Fix the DTC U2023?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U2023 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 U2023 code?

Need more information on how to fix the U2023 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2023 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U2023 Ford — Fault Received From External Node
U2023 Lincoln — Fault Received From External Node
U2023 Mercury — Fault Received From External Node

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 U2023 Code

1. What are the common symptoms of OBDII code U2023?

- Common symptoms include difficulty starting the vehicle, rough idling, poor acceleration, and illuminated warning lights on the dashboard.

2. What does the OBDII code U2023 indicate?

- The code U2023 signifies a fault received from an external node, typically related to communication issues within the vehicle's network.

3. What are the possible causes of OBDII code U2023?

- The code U2023 can be triggered by issues such as damaged wiring, loose connections, faulty control modules, or a malfunctioning external node in the vehicle's network.

4. How can I diagnose the cause of OBDII code U2023?

- Diagnosing the code U2023 often involves checking the wiring and connections related to the external node, testing the communication network using a diagnostic scanner, and inspecting the control modules for any faults.

5. Are there any specific repair tips for fixing OBDII code U2023?

- Repairing OBDII code U2023 may involve repairing or replacing damaged wiring, securing loose connections, resetting control modules, or replacing the malfunctioning external node as necessary.

6. Can OBDII code U2023 cause any long-term damage to the vehicle?

- While the code U2023 itself may not directly cause damage, unresolved communication issues within the vehicle's network can lead to further electrical problems if left untreated.

7. Is it safe to continue driving with OBDII code U2023 present?

- It is generally not recommended to continue driving with the code U2023 active, as it can affect the vehicle's performance and potentially lead to other issues down the line.

8. How much does it typically cost to repair OBDII code U2023?

- The cost of repairing OBDII code U2023 can vary depending on the underlying cause, but it may range from a simple fix like reattaching a loose connection to more complex repairs involving control module replacements.

9. Can I reset OBDII code U2023 on my own?

- You can attempt to reset the code U2023 using an OBDII scanner, but it is important to address the root cause of the issue to prevent the code from reoccurring.

10. Is OBDII code U2023 a common issue in specific vehicle makes and models?

- The occurrence of OBDII code U2023 can vary across different vehicle makes and models, but it is generally seen in vehicles with advanced network communication systems.