AutoCodes – Generic – U1202

U1202 Code - Invalid Or Missing Data For Windows

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Module that is not communicating, Module harness is open or shorted, 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: U1202 indicates Invalid Or Missing Data For Windows.
Common causes: Common causes include Faulty Module that is not communicating, Module harness is open or shorted, 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 7,947

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 May 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1202 Description

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for State of Health monitoring. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. When a module does not associate an identification number with at least one critical parameter within 5 seconds of beginning serial data communication, the Diagnostic Trouble Code (DTC) is set.

OBDII Code U1202 - Invalid Or Missing Data For Windows - AutoCodes.com — U1202 Code - Invalid Or Missing Data For Windows

What does this mean?

What are the Possible Causes of the DTC U1202?

Faulty Module that is not communicating
Module harness is open or shorted
Module circuit poor electrical connection

How to Fix the DTC U1202?

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 U1202 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 U1202 code?

Need more information on how to fix the U1202 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1202 code diagnosed by a professional: Find a repair shop in your area

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 U1202 Code

1. What are common symptoms of OBDII code U1202 (Invalid Or Missing Data For Windows)?

- Common symptoms include issues with power windows, power locks, or other electronic window-related functions in the vehicle.

2. What could cause OBDII code U1202 to appear?

- The code U1202 may appear due to wiring issues, faulty window control modules, damaged window switches, or communication errors within the vehicle's network.

3. How can I diagnose the cause of OBDII code U1202?

- Diagnosis typically involves checking the wiring and connectors related to the window system, testing the window control modules, and using a diagnostic scan tool to analyze communication data.

4. Can OBDII code U1202 be triggered by a blown fuse?

- Yes, a blown fuse related to the window circuit can also trigger the U1202 code as it disrupts the power supply to the window control modules.

5. What are some repair tips for addressing OBDII code U1202?

- Repair tips may include checking and replacing blown fuses, inspecting and repairing damaged wiring, testing and replacing faulty window control modules, and ensuring proper communication within the vehicle's network.

6. Is it safe to continue driving with OBDII code U1202 present?

- It is generally safe to continue driving with the U1202 code, but it is recommended to address the issue promptly to prevent further damage to the window system or related components.

7. Can resetting the OBDII system clear the U1202 code temporarily?

- Yes, resetting the OBDII system may temporarily clear the U1202 code, but if the underlying issue is not resolved, the code is likely to reappear.

8. Are there any common vehicle makes or models prone to experiencing OBDII code U1202?

- While the U1202 code can potentially occur in any vehicle with power windows, certain makes and models known for electrical issues may be more prone to experiencing this code.

9. How much does it typically cost to repair OBDII code U1202 at a professional auto repair shop?

- The cost of repairing OBDII code U1202 can vary depending on the specific cause of the issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.

10. Can weather conditions affect the occurrence of OBDII code U1202?

- Extreme weather conditions, such as heavy rain or extreme cold, can potentially exacerbate existing wiring or electrical issues leading to the appearance of the U1202 code.