AutoCodes – Generic – U0222

U0222 Code - Lost Communication With Door Window Motor 'A'

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 'A', Door Window Motor 'A' harness is open or shorted, Door Window Motor 'A' 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: U0222 indicates Lost Communication With Door Window Motor 'A'.
Common causes: Common causes include Faulty Door Window Motor 'A', Door Window Motor 'A' harness is open or shorted, Door Window Motor 'A' 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 2,574

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 U0222 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 'A' has not been received.

OBDII Code U0222 - Lost Communication With Door Window Motor 'A' - AutoCodes.com — U0222 Code - Lost Communication With Door Window Motor 'A'

What does this mean?

What are the Possible Causes of the DTC U0222?

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

How to Fix the DTC U0222?

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 U0222 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 U0222 Code

1. What does the OBDII code U0222 mean?

U0222 indicates that the vehicle's main control module has lost communication with Door Window Motor 'A,' typically due to wiring, module, or communication issues.

2. What are the common symptoms of a U0222 code?

Symptoms may include an inoperative power window, no response from the affected window motor, or an illuminated check engine or other warning light.

3. What causes the U0222 code to appear?

Common causes include damaged wiring or connectors, a faulty door window motor, a malfunctioning control module, or network communication issues.

4. Can I still drive my vehicle with a U0222 code?

Yes, you can drive the vehicle, but the affected window may not function, which could be inconvenient or pose safety concerns.

5. How do I diagnose a U0222 code?

Diagnosis involves checking the wiring and connectors to the window motor, inspecting the motor itself, and using a scan tool to verify communication with the module.

6. How can I fix the U0222 code?

Repairs may include fixing or replacing damaged wiring, reconnecting loose connectors, or replacing a faulty door window motor or control module.

7. Does the U0222 code always mean the door window motor is faulty?

No, the issue could also stem from wiring problems, a failed control module, or network communication errors.

8. What tools do I need to troubleshoot a U0222 code?

You will need a scan tool capable of reading manufacturer-specific codes, a multimeter for testing electrical circuits, and possibly wiring diagrams for your vehicle.

9. How much does it cost to fix a U0222 code?

Repair costs vary depending on the cause, ranging from $50 to $150 for simple wiring repairs to $200 or more for replacing the window motor or module.

10. Can a U0222 code clear itself?

The code may clear temporarily if the issue is intermittent, but it will likely return until the root cause is resolved.