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AutoCodes - Generic - U0421

U0421 Code - Invalid Data Received From Suspension Control Module 'A'

- Code Popularity: 15,286 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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By AutoCodes.com - Updated Apr 11, 2020
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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 code 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.

Does your car have Safety Recalls? → Check here

|Cost of diagnosing U0421 code

Labor: 1.0

The cost of diagnosing the U0421 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs 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.

OBDII Code u0421 - Invalid Data Received From Suspension Control Module 'A' - AutoCodes.com
U0421 Code - Invalid Data Received From Suspension Control Module 'A'

|Need more information with the U0421 code?

Need more information on how to fix the U0421 code? Get Access to Factory Service Manuals

|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 area

|U0421 code comments

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