U0321

Software Incompatibility With Suspension Control Module A

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

~$167 (est.)

Symptoms

Check Engine Light Is On
Incorrect suspension operation
Disabling adaptive suspension features
Error message on the dashboard
Deterioration in vehicle handling

Causes

Incompatible software versions in the ECU and suspension module
Incorrect software update
Installing a non-original suspension module
Damage to the suspension control module
Problems with communication between modules

How to Fix

System diagnostics using a scanner
Checking the relevance of the software of all modules
Suspension Module Software Update
Reflash the ECU if necessary
Replacing the suspension module if it is faulty

Related codes

U0322 U0121 U0401