Nissan Repair Questions? Ask a Mechanic for Answers ASAP
P0011 NISSAN - Intake Valve Timing Control Performance.
Given the 'service' so far, initially I would check the timing to make sure that it is correct after the head gasket replacement.
Next the camshaft then crankshaft sensors and circuits need checking - often is is easier to just swop the sensors out than to set us a scope to test them, given the price.
Was this dtc present before the head gasket replacement? If not definitely re check the timing.