Nox sensor. What is it? How much does it cost to repair?

egr is smog
some countries even calif is a country (with C.A.R.B) laws
that dictate what EGR systems can be used.(by year/engine)
SO your head has EGR main there?. clear as day right?

no VIN told or country told.
but then you shop for head.s and wonder why some have it and others do not, well now you know. (laws from 1979 to now)

cars that do not need EGR (engines or countries)
we add VVT to it and no more egr (valve main i mean)
we have special cam in the engine that is egr free (my jeep had it in 1988)
we run lower compression ratio and no more egr
we run smarter knock sensors and no more egr.
the knock is heard even at tiny levels and spark is retardedd fast.

egr is NOX gas reduction system and there piles of ways to do that
and also the 3way cat also eats NOX for breakfast.
nox happens going fast up hill, mostly.
lots of ways to control NOX. gases (and is very nasty stuff)

no year told. and 44 TON heavy truck and we do not do those here.
2002 to 2919 made. lots. and not the same.
no country told and matters huge for smog parts or related.
cars and light trucks ,used by home owners etc.
stop gue$$ing please.
get the IVECO serviced! in a real shop. (it is complex )
they do DIAGNOSIS first and repairs last, or go broke guessing, endless.

getting is repaired by mechanic is obviously very expensive
I take help from online websites that have this service like helping in repair... some like reliable-store have instant help 24x7.. others are a bit slow which I don't prefer... rest is up to u.. U can also get free manuals

code p3081 refers to engine temperature too low===causes--allow engine to warm up---cooling system fault
I would check for a thermostat stuck open

code p0322 refers to crank shaft position (CKP) sensor/engine speed (RPM) sensor--no signal===causes--wiring---CKP/RPM sensor---ECM

This is for the NOX sensor-heater control-circuit malfunction. Many sites try to interchange numbers and give you common P0172 which is for richness. But specific Brand info for Hyundai is P1072 and that is a NOX part.

Please rate my info.

Ring up your VW dealer and make a booking, any recall items should be carried out/repaired free of charge.

Sure, but WHICH sensor? If thats all it needs , get the seller to pay for the repairs. Dont buy it until its either fixed, or you have a qualified repair shop diagnose and give you an estimate for repairs.

it should be near a coolant hose or your water pump

you know it could be easy fix but just repairing a wire or two but if you need a harness then your looking for trouble if you need anything else go to collisionrepairadvice.com its worth it

I have yet to see a car with a Nitrogen Oxides(NOx) sensor on it. However I have seen Oxygen (O2) sensors. The O2 sensor monitors the remaining amount of oxygen left in your exhaust, and tells your Engine Control Unit(ECU) how much fuel to use. The sensor looks much like a stainless steel spark plug and is found in the exhaust system. Your car being a 1991 it should only have one. It will be up stream of the Catlytic converter, maybe in the Exhaust manifold. cost between 50 and 150$us.