AutoCodes – Cadillac – U18C3 Cadillac

U18C3 Cadillac Code - Lost Communication With Video Processing Control Module On High Speed CAN Bus

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Video Processing Control Module, Video Processing Control Module harness is open or shorted, Video Processing Control 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: U18C3 Cadillac indicates Lost Communication With Video Processing Control Module On High Speed CAN Bus.
Common causes: Common causes include Faulty Video Processing Control Module, Video Processing Control Module harness is open or shorted, Video Processing Control 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 523

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 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U18C3 Cadillac Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device. The Diagnostic Trouble Code (DTC) will set a supervised periodic message that includes the transmitter device availability that has not been received.

OBDII Code U18C3 Cadillac - Lost Communication With Video Processing Control Module On High Speed CAN Bus - AutoCodes.com — U18C3 Cadillac Code - Lost Communication With Video Processing Control Module On High Speed CAN Bus

What does this mean?

What are the Possible Causes of the DTC U18C3 Cadillac?

Faulty Video Processing Control Module
Video Processing Control Module harness is open or shorted
Video Processing Control Module circuit poor electrical connection

How to Fix the DTC U18C3 Cadillac?

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 U18C3 Cadillac 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 U18C3 Cadillac code?

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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 U18C3 Cadillac Code

1. What are the common symptoms of OBDII code U18C3 in a Cadillac related to lost communication with the Video Processing Control Module on the High-Speed CAN bus?

- Common symptoms include loss of video display, malfunctioning cameras, flickering screens, and error messages related to the video system.

2. What are the possible causes of the U18C3 code in a Cadillac?

- The code may be triggered by issues such as a faulty Video Processing Control Module, damaged wiring or connectors, a defective High-Speed CAN bus, or software glitches.

3. How can I diagnose the U18C3 code in my Cadillac?

- Diagnosis involves using a professional OBDII scanner to retrieve the code, checking the connections and wiring related to the Video Processing Control Module, and performing a thorough inspection of the high-speed CAN bus.

4. Can I still drive my Cadillac with the U18C3 code present?

- It is not recommended to drive the vehicle with the U18C3 code as it may lead to further damage to the video system and affect the overall functionality of the vehicle.

5. How can I repair the U18C3 code in my Cadillac?

- Repairing the U18C3 code typically involves addressing the root cause, which may include replacing the Video Processing Control Module, repairing damaged wiring, ensuring proper connections, and updating software if needed.

6. Is it possible to reset the U18C3 code in a Cadillac without fixing the underlying issue?

- While you can clear the code temporarily, it is crucial to address the underlying problem to prevent the code from reoccurring and to ensure the proper functioning of the video system.

7. Can extreme weather conditions cause the U18C3 code to appear in a Cadillac?

- Yes, extreme temperatures or humidity levels can sometimes lead to electrical issues that result in the U18C3 code triggering due to poor connections or module malfunctions.

8. How long does it typically take to repair the U18C3 code in a Cadillac?

- The repair time can vary depending on the exact cause of the issue and the availability of parts. It is recommended to consult with a professional mechanic for a more accurate estimate.

9. Will fixing the U18C3 code require specialized tools or equipment?

- Repairing the U18C3 code may require specialized diagnostic tools for troubleshooting the video system and the high-speed CAN bus, so it is advisable to seek assistance from a qualified technician.

10. Is the U18C3 code a common problem in Cadillac vehicles?

- While not extremely common, the U18C3 code related to lost communication with the Video Processing Control Module can occur in Cadillac vehicles, especially in models with advanced video systems.