Hi,

I've got a P0174 code which returns after clearing - so time to do something about it.

My first thought is change out the downstream O2 sensor(s)

https://www.island-4x4.co.uk/sensor-oxygen...-4689.html

(I realise this is an upstream sensor) but it says "not suitable for LPG"

Are there specific sensors for LPG? If so can anyone point me to them?

Any other thoughts \ advice on P0174 error?

Thanks

How's things if you run on petrol for a few days?
If it's still pulling codes up on petrol I'd look for a vacuum leak specific to that bank first.

If you do change 02 sensor it will most likely be the upstream one, re suitable for lpg, first time I've seen one stating its not tbh.

Denso is the preferred make

Thanks dingg1

Tried running only on petrol twice - comes up fairly quickly after clearing it.

Any pointers where to \ how to find a potential vac leak?

Have a look at the workshop manual for your engine, could be any of the vacuum hoses with a break in them, if you can monitor fuel trims and start throwing break cleaner or propane at any suspect places it should confirm things.
If you have no luck get it to someone with a smoke machine and they will probably be able to find any leaks

Brake cleaner doh