Hi guys, i have just replaced VCG and CCV kit, installed throttle body gasket, Intake Elbow (was not bad actually) and cleaned Mass AirFlow sensor while I was at it, p171/174 stopped showing up but in a few days, in the morning, just as I start the X, SES lights up, according to Torque, it is P0598 code, anyone has any idea what it is/how to troubleshoot? Thanks in advance.

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2009 Range Rover Sport SC HST Limited Edition
2014 Infiniti Q50 AWD