AutoCodes – Generic – U0223

U0223 Code - Lost Communication With Door Window Motor 'B'

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Faulty Door Window Motor 'B', Door Window Motor 'B' harness is open or shorted, Door Window Motor 'B' 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: U0223 indicates Lost Communication With Door Window Motor 'B'.
Common causes: Common causes include Faulty Door Window Motor 'B', Door Window Motor 'B' harness is open or shorted, Door Window Motor 'B' 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 2,397

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 Apr 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0223 Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. CAN bus uses two dedicated wires for communication. The wires are called CAN high and CAN low. When the CAN bus is in idle mode, both lines carry 2.5V. When data bits are being transmitted, the CAN high line goes to 3.75V, and the CAN low drops to 1.25V, thereby generating 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 Door Window Motor 'B' has not been received.

OBDII Code U0223 - Lost Communication With Door Window Motor 'B' - AutoCodes.com — U0223 Code - Lost Communication With Door Window Motor 'B'

What does this mean?

What are the Possible Causes of the DTC U0223?

Faulty Door Window Motor 'B'
Door Window Motor 'B' harness is open or shorted
Door Window Motor 'B' circuit poor electrical connection

How to Fix the DTC U0223?

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 U0223 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.

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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 U0223 Code

1. What does the OBDII code U0223 mean?

U0223 indicates a loss of communication between the control module (e.g., the Body Control Module) and Door Window Motor 'B', meaning the module cannot send or receive data from the motor.

2. What are the common symptoms of code U0223?

Symptoms include non-functional power windows, intermittent window operation, or windows stuck in one position. You may also notice other electrical issues in the affected door.

3. What causes the U0223 code to appear?

Common causes include a faulty window motor, damaged wiring or connectors, issues with the CAN bus network, or a malfunctioning control module.

4. How do I diagnose the U0223 code?

Start by checking the wiring and connectors for damage or corrosion. Use a scan tool to test communication with the Door Window Motor 'B' and inspect the CAN bus system for faults.

5. Can I still drive my car with the U0223 code active?

Yes, the car is still drivable, but the affected window may not function properly. However, unresolved electrical issues could lead to further problems down the line.

6. How do I fix the U0223 code?

Repairs may involve replacing or repairing damaged wiring, cleaning corroded connectors, reprogramming or replacing the control module, or replacing the faulty window motor.

7. Can a weak battery cause the U0223 code?

Yes, a weak or failing battery can cause communication issues on the vehicle’s CAN bus network, potentially triggering the U0223 code.

8. How much does it cost to repair the U0223 code?

The cost varies depending on the issue. Simple fixes like repairing wiring may cost $100–$200, while replacing a window motor or control module can cost $300–$600 or more.

9. Can I clear the U0223 code without fixing the problem?

You can clear the code with an OBDII scanner, but it will likely return if the underlying issue is not resolved.

10. What tools do I need to troubleshoot the U0223 code?

You’ll need an OBDII scanner, a multimeter for testing electrical connections, and possibly wiring diagrams for your vehicle to trace the CAN bus network.