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2006 Infiniti M45 with code P1140. What does P1140 CNF Mod 10 1/2 mean?

Vehicle: 2006 Infiniti M45

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P1140 is for the Intake Valve Timing Control Bank 1. Since the Intake 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 the engine code. 

The oil should be replaced every 4k miles. 

The Intake Valve Timing Control valve may also be removed and cleaned with brake cleaner

Infiniti Intake Valve Timing Control Location

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replaced intake valve timing b1, light on again in 2 weeks

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