P056F: Cold Start Turbocharger/Supercharger Boost Control B Performance
What Does P056F Mean?
P056F is a diagnostic trouble code indicating: Cold Start Turbocharger/Supercharger Boost Control B Performance. This code relates to the vehicle speed and idle control system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.
What To Do Next
-
1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
-
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
-
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.