2008 G35 Bank 2 Timing too advanced P0014

P0014 INFINITI - Exhaust Valve Timing Control Performance Bank 1...Possible causes; Dirty Oil; Faulty Exhaust valve timing control solenoid valve, Exhaust valve timing control solenoid valve harness is open or shorted, Exhaust valve timing control solenoid valve circuit poor electrical connection, Faulty Crankshaft position sensor (POS), Faulty Camshaft position sensor...Since the exhaust valve timing control solenoid valve uses oil flow to control timing, dirty oil can cause the valve to stuck open or close. Before replacing the valve, change engine oil and filter and reset engine code.