How to solved Skoda engine warning lights

Inspection and analysis:
Maintenance personnel fault diagnostic detection engine control unit, reads to 5 fault codes, namely: P2015- intake manifold throttle position / operational control sensors, credible signal / sporadic (out of 3 times); P2279- intake system The small amount of air flow / static; P0171- column a cylinder, fuel measurement system, the system too lean / static; P0304- cylinder 4 misfire detected / incidental; P0302- cylinder 2 misfire detected / incidental.
According to the fault code inference engine may be caused by the presence of system leaks above fault code. The engine control unit reads the data flow, but also found no problems. Carefully check the engine system, no leakage points. According to the experience try replacing crankcase ventilation valve, after repeated test showed no abnormalities, the engine fault light is no longer lit, the car delivered to customers. After two days, the customer again due to engine failure lights and back to the shop for maintenance. After the maintenance staff to start the engine and found a large shake at idle, and can hear the sound of the leak. Look carefully based on the sound and found the intake manifold flap actuators (with integrated intake manifold) at the leak. Shake the artificially intake manifold throttle actuator, to a point where the leak sound disappears, engine idling flew back to normal.
Troubleshooting:
After replacing the intake manifold assembly, the fault completely ruled out.