Had the same code 2 weeks ago and follow the ross-tech wiki recommendations.
16683/P0299/000665 - Boost Pressure Regulation: Control Range Not Reached
Possible Symptoms
Reduced Power Output
Limp Mode
Possible Causes
Hoses/Pipes incorrect connected, disconnected or leaking
Charger Pressure Control defective
Turbocharger faulty
Diverter Valve faulty
Possible Solutions
Check Hoses/Pipes to/between Components
Check / Clean / Replace Charge Pressure Control
Check Turbocharger
Check Diverter Valve
Special Notes
If the Turbocharger is faulty due to mechanical / internal problems or the exhaust system is restricted (typically the Catalyst) this fault may be the end result.
In my case it was a clogged pcv valve, cleaned it out with dishwasher soap, dryed it out and put it back on, after 2 weeks code did not come back.
16683/P0299/000665 - Boost Pressure Regulation: Control Range Not Reached
Possible Symptoms
Reduced Power Output
Limp Mode
Possible Causes
Hoses/Pipes incorrect connected, disconnected or leaking
Charger Pressure Control defective
Turbocharger faulty
Diverter Valve faulty
Possible Solutions
Check Hoses/Pipes to/between Components
Check / Clean / Replace Charge Pressure Control
Check Turbocharger
Check Diverter Valve
Special Notes
If the Turbocharger is faulty due to mechanical / internal problems or the exhaust system is restricted (typically the Catalyst) this fault may be the end result.
In my case it was a clogged pcv valve, cleaned it out with dishwasher soap, dryed it out and put it back on, after 2 weeks code did not come back.
