As Old Tony suggests have a look at the outlet on the valve cover for the PCV. You can see the hose clamp on it in your first photo.
The other thing it might be is the top injector seal on No. 4. I've had that issue before and yours is looking a bit suspucious. With the engine running you may...
Well I'm pleased my little screenshot video was helpful and got you heading in the right direction.
Report back to this thread once you've done the keys as it's handy information. We know the AP200 does the D40 (Thai built) and hopefully you'll find the same with the NP300.
For interest after...
I refreshed my memory doing keys with the AP200 on the Thai built 2011 D40 and did a screenshot video of the menu steps. Note there's a sub menu called NATS (Nissan Anti Theft System) in the Nissan module so that's what I have to go into.
I went right up to the Erase keys sub menu then cancelled...
I thought this part of the table was relevant and I can see it's the same for my Thai D40 2011 as it is for the NP300. The abbreviations seem to imply erasing and registering keys in the BCM. Tomorrow I'll connect my AP200 and let it update to the latest software and have a look at the IMMO...
When I check the vehicle coverage on the Autel website it suggests the AP200 will do the IMMO/Keys for the NP300
https://www.auteltech.com/vehicle-coverage/coverage2
Phillip it's been a few years since I did my key however that screenshot doesn't seem familiar ... the software's probably been updated since I last used it for the keys. I found a couple of YT videos that explained it pretty well.
Yes that's correct ... you reprogram all keys. Once you're in the programming mode you can have ten keys and program them all. It works well.
For information this is where I bought my replacement key. Locksmiths wanted about $200 for the same thing and Nissan was a lot more. I took my original...
I bought one of these for about $AUD100 and it programs keys and injectors. I used it on my 2011 D40 Navara to program a new key I purchased on Aliexpress.
https://www.autel.com/mk1/3262.jhtml
You can purchase UCA ball joints for Spanish and Thai D40's. I purchased 25mm extended UCA ball joints and installed myself on my Thai D40. You need a ball joint press to push the old ones out and the new one's in. The press tool is available for about $70 on eBay.
My understanding is the...