Hello and Welcome -
My name is XXXXX XXXXX Im happy to help / advise you -
I will give you a drawing below - because its a little hard to describe - that will show you the position of the Idle control sensor on this model... known as ISC control..
To explain a little further for you - usually any issues with this is cured by a thorough clean of the TB - throttle body - with a suitable carb spray cleaner - from a car shop. Use copious amounts to do this -
I would also suggest to carefully check the gasket / seal - where the TB mounts to the inlet manifold - check the tightness of the TB-sometimes the work loose and cause what you have.
Check for any air inlet / ingress leaks - any un metered air getting into the engine on the inlet side will cause what you have. Check the pipe work for perishing - loose fitting etc... generally the fault such as this is found this way - Any such air leak will affect he ISC - and cause a fault code for that - so you need to be sure its not such a leak etc - as opposed to condemning the ISC.
You may find you need to remove the TB to access it fully -
The image I mentioned for you is below - click to open / use -
One way or the other as above you should get this sorted.
Let me know if you need anything else -
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