U0421 Code - Invalid Data Received From Suspension Control Module 'A'
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U0421 code possible causes
- Faulty Suspension Control Module 'A'
- Suspension Control Module 'A' harness is open or shorted
- Suspension Control Module 'A' circuit poor electrical connection
How do I fix the U0421 code?
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.Cost of diagnosing the U0421 code
Labor: 1.0
The cost of diagnosing the U0421 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.What are U0421 code possible symptoms?
- Engine Light ON (or Service Engine Soon Warning Light)
U0421 code description
A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. Some devices are constantly receiving information from other devices through serial data communication network. The invalid data Diagnostic Trouble Code (DTC) will be set when a receiving device detects a discrepancy in the information it receives from the Suspension Control Module 'A' causing its integrity to be questioned.
Need more information with the U0421 code?
Need more information on how to fix the U0421 code? Get Access to Factory Service ManualsU0421 code information for specific makes
- U0421 BUICK Invalid Data Received From Suspension Control Module
- U0421 CADILLAC Invalid Data Received From Suspension Control Module
- U0421 CHEVROLET Invalid Data Received From Suspension Control Module
- U0421 GMC Invalid Data Received From Suspension Control Module
Need help with a U0421 code?
Get the U0421 code diagnosed by a professional: Find a repair shop in your areaU0421 code comments
Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the U0421 code? Have you replaced any parts?Any information is appreciated. Thanks