2006 nissan quest is leaking oil from oil sensor how do I fix it

Question edited for clarity and the typos - Nissian, cyclinder, vam, and PO 304 is P-zero not P-letter Oh..
Question moved to model category

What makes you think it is the Crankshaft Sensor? This is a simple misfire on Cylinder 4. Check plug, leads and coil. Run some Injector cleaner.

The P0304 code stands for "Cylinder 4 Misfire Detected", which means your vehicle's cylinder 4 has misfired enough times for your powertrain control module (PCM) to notice. A worn spark plug, a faulty fuel injector, and a leaking valve are some possible causes of the P0304 code.
Jul 28, 2023

P0304 Code: Cylinder 4 Misfire Detected - CarParts.com

https://www.justanswer.com/nissan/58ol6-2004-nissan-quest-5spd-where-crankshaft-sensor-located-diy.html

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Fuse 12 for the brake switch, but it covers a lot of other things as well that would be very noticeable.

Automatic Speed Control Device (ASCD) Brake Switch, Data Link Connector, Combination Meter, Heated Seat Relay, Park Neutral Position Switch, Display Unit, Steering Angle Sensor, Display Control Unit, Navi Control Unit, Back Door Control Unit, Sliding Door Control Unit RH/LH, Sonar Control Unit, Daytime Running Lights, Hands Free Telephone

Nissan Quest (V42; 2004-2009) fuses and relays

Fuse Box Diagrams https://fuse-box.info > nissan > nissan-quest-v42-2004...

Here you will find fuse box diagrams of Nissan Quest 2004, 2005, 2006, 2007, 2008 and 2009, get information about the location of the fuse panels inside the car ...

Missing: 1994 ‎' Show results with: 1994

Which sensor ? O2 ?

p0171 refers to system too lean bank 1 causes ---intake /exhaust leak AIR system---MAF/VAF sensor---fuel pressure/pump---injector/s -- HO2s .==check the flexible section of the exhaust at the manifold for cracks -check the hos2 sensor==have a pressure test done on the fuel manifold.

To check first,reset see what happen[save code #]and fix the problem.

change your oil.

Camshaft? the camshaft cant leak coolant, or oil?

I've had same problem with different vehicle. Have you tried removing it when engine is cold, or just when it was warm? Have you tried squeezing it at same time?

Check your crank sensor. You might have an oil leak that is getting inside the sensor which is the reason why it wont start when hot. When oil is cold, its thicker so it leaks slower. Have a mech check it out.

You have replaced it twice, perhaps the fly wheel is cutting it or inside the part that connects to the crankcase is an "O"Ring or you have to inspect the fly wheel look for cracks, inspect the seal that You all ready removed