Np200 model 2008 throttle problem

Clean the Electronic Throttle Body. That is what the throttle position sensor pedal connects to. Also make sure the connectors are clean.

https://www.google.com/search?q=Nissan+NP200+1.5DCi+clean+throttle+body

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Sounds like the throttle body may need cleaning. You could also have a vacuum hose leak. Most throttle bodies doesn't have an idle screw.

The throttle valve is motor actuated and it (the motor) is where the throttle cable used to be on older engine that used a manual throttle.

Could be a few things causing this, try pulling the codes with an OBD II reader. If you don't have one you can buy them pretty cheap at places like harbor freight tools or ebay. Your local auto parts supply store may even rent one to you.

1. Yes..also throttle body could be dirty.try a can of throttle body cleaner..that may do the trick.

had the same problem with the same year model, changed the idle position sensor, did not fix problem. took it to dealer because I was told that it had to have an idle relearn program ran on it, it didn't take and the dealer toldme that I need a ECM (engine control module) basically a new computer and it would cost with labor about 1100.00 dollars.

Throttle position sensor bad or idle motor bad try unplug idle motor swing buy auto zone for a free scan they will find it

it might be the ECU, when cold the computer raises the iddle to warm it up, when reaches temp., it dropes it down to normal iddle, but it might not know where the correct iddle is, it might be another sensor like a cam, map, throttle position senssor.

usually when a car wont iddle it may have a blown head gasket , remove oil filler cap on rocket or tappet cover check for creamy coloured oil , if so blown head gasket , also when morot is cool remove radiator cap and check fro brownish residue under cap if so blown head gasket .
remove each spark plug if one or more of them is white on tip of plug water is getting into cylinder ..

if none of these some carby's or throttle body's have iddle screww which can be adjusted to speed up iddle , or if throttle body it may have an iddle soleniod which may need to be replaced ,
i hope for you is is just and iddle issue , both the solenion and head gasket arnt cheap to fix.
the soliniod although easier to remove and replace its cost is usually .... expensive on most makes of cars , dont know why just because there greedy dealerships !

hope you need only to adjust carby or check timing is o.k

good luck hope this helps

weak fuel pump. clugged fuel filter. fouling out plugs.