U0300

Internal Control Module Software Incompatibility

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

~$167 (est.)

Symptoms

Check Engine light comes on
Possible problems with engine operation
Reduced vehicle performance
Errors in other systems
The car may go into emergency mode

Causes

Incorrect ECU software update
Incompatible software versions between modules
Errors when flashing the control unit
Using unofficial software
Software corruption

How to Fix

Check software versions of all related modules
Update software to the latest compatible versions
Reset errors after update
Check the operation of all systems
Contact your dealer for official update

Related codes

U0301 U0302 U0303