U0421 - Invalid Data Received From Suspension Control Module A
U0421 is a generic network/communication diagnostic trouble code indicating Invalid Data Received From Suspension Control Module A. It relates to the System-Specific system.
DTC Breakdown (SAE J2012)
| System | Network/Communication (U) |
| Type | Generic |
| Subsystem | System-Specific |
| Fault Index | 21 |
| Standard | SAE J2012 / ISO 15031-6 |
What does diagnostic code U0421 mean?
The dtc/">diagnostic trouble code U0421 represents Invalid Data Received From Suspension Control Module A. 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 U0421 are currently being compiled. Always verify check engine warnings with a qualified mechanic.
Frequently Asked Questions about U0421
What does U0421 mean?
The diagnostic trouble code U0421 represents Invalid Data Received From Suspension Control Module A. This standard generic code points to a monitored fault condition in the vehicle's Network/Communication network.
What is the system for U0421?
The U0421 code is located in the vehicle's Network/Communication network.