Member Credit: EddyMaxx
Our 2009 7thgen Nissan Maxima threw code P0075 – Intake Valve Control Solenoid Circuit (Bank 1). Bank 1 is the location closest to the Firewall. The first thing to always do is to check the connectors and harness to see if it’s broken or has any exposed wiring. Upon inspection, I discovered one of the wires to the plug was broken. This likely happened when our belt shredded one day during the winter.
The good news is that it was an easy fix. We jacked up the car, removed passenger side wheel and unclipped the connector. We brought the connector to the top of the engine where we re-wired and unified the connections. Very simple!
Below is how the harness looked.
This is where it plugs into:
Yay, CEL free again! Just in time for annual NYC car inspection.
From Nissan FSM:
Intake valve timing control solenoid valve is activated by ON/OFF pulse duty (ratio) signals from the ECM.
The intake valve timing control solenoid valve changes the oil amount and direction of flow via the intake valve timing control unit or stops the oil flow. The longer pulse width advances valve angle. The shorter pulse width retards valve angle. When ON and OFF pulse widths become equal, the solenoid valve stops oil pressure flow to fix the intake valve angle at the control position.