If you’re facing the U1123 Skoda databus error, you’re not alone. This fault code U1123, also displayed as U112300 – Databus Error Value Received, is common in Volkswagen, Audi, Skoda, Porsche, and even Toyota and Renault models. Here’s everything you need to know to resolve it.
What Does U1123 Mean?
The U1123 code generally points to a communication error between control modules. In Skoda cars, this is often read as:
- Databus Error Value Received
- U1123 00 Skoda
- U1123 fault code VW
- U1123 Skoda Octavia, Kodiaq, Superb, and more.
It signals that a control module has received an invalid or incorrect value via the data bus (CAN line).
Affected Models and Symptoms
This fault code has been reported across:
- Skoda U1123 (Octavia, Superb, Kodiaq, Fabia)
- VW U1123 (Tiguan, Polo, Golf)
- Audi U1123 (A4, A6)
- Seat U1123
- Porsche U1123
- Toyota U1123
- Renault U1123
Common Related Errors:
- Skoda P26F400
- Skoda B104B31 – Key No Signal
- P1612 Skoda
- P177B Skoda, P177C VW
- Skoda Error U112300
- Skoda Error Code P1889
🔄 Step-by-Step Solution for U1123 Databus Error:
- Scan with OBD2 Tool
Use a professional OBD2 scanner to detect U1123 00 VW/Skoda and any other related codes like Skoda P26F400. - Check CAN Connections
Inspect the wiring harness, connectors, and the CAN bus line for any damage or corrosion. - Inspect Control Modules
Check modules like ABS, ECU, steering, and comfort modules for communication issues. - Battery Health Check
A weak or dying battery may also trigger this error. - Software Update
Skoda dealerships may provide ECU/TCM updates that can resolve U1123-related bugs. - Replace Faulty Module
If a particular module consistently throws U1123 faults, it may require replacement or repair.
When to Seek Expert Help
If you’re getting multiple related codes (like Skoda B104B31, VW U1123, or Audi U1123), or if the vehicle enters limp mode, contact a professional technician or your nearest Skoda service center.
Conclusion
The U1123 fault code can be frustrating, but with the right diagnostic steps, it’s usually solvable. Whether you drive a Skoda Octavia, VW Tiguan, or Audi A4, understanding what U112300 – Databus Error Value Received means can save you both time and money.
Want to decode more error codes like P1612, P177B, or P26F400? Visit our Skoda Error Codes section.
“Other common throttle-related fault codes include OBD Code P1545 – Throttle Valve Control System which affects engine control response.”
