U0400 - Invalid Data Received
U0400 is a generic network/communication diagnostic trouble code indicating Invalid Data Received. It relates to the System-Specific system.
DTC Breakdown (SAE J2012)
| System | Network/Communication (U) |
| Type | Generic |
| Subsystem | System-Specific |
| Fault Index | 00 |
| Standard | SAE J2012 / ISO 15031-6 |
What does diagnostic code U0400 mean?
The dtc/">diagnostic trouble code U0400 represents Invalid Data Received. This standard generic code points to a monitored fault condition in the vehicle's Network/Communication network.
Detailed diagnostic guides and specific fix procedures for code U0400 are currently being compiled. Always verify check engine warnings with a qualified mechanic.
Frequently Asked Questions about U0400
What does U0400 mean?
The diagnostic trouble code U0400 represents Invalid Data Received. This standard generic code points to a monitored fault condition in the vehicle's Network/Communication network.
What is the system for U0400?
The U0400 code is located in the vehicle's Network/Communication network.