P0299 The OBD-II code P0299 signifies a "Turbocharger/Supercharger A Underboost Condition," meaning the turbocharger isn't producing enough boost pressure for the engine. This is often caused by a leak in the boost system, a faulty turbocharger or actuator, a restricted air filter or diesel particulate filter, or a bad boost pressure sensor. Symptoms include loss of engine power and an illuminated check engine light. This video explains how to diagnose and fix a P0299 code: Common causes of P029

Audi A5 fault code P261A (Coolant pump B open circuit). Fault code P261A (Coolant pump B open circuit). Research found that this is quite a common issue with these family of engines. This fault code can cause some confusion as this engine has three water pumps. TaT members can read a repair solution on Volkswagen Amarok with a similar issue at https://www.tat.net.au/tatsafact/3402 Burson Auto Parts | The Automotive Technician