P38 4.0 Thor Help with o2 sensor locations & LPG issue

Help with o2 sensor locations & LPG issue..

I'm trying to get info on where each o2 sensor bank 1 and 2...and sensor 1 and 2 is located.

Also anyone know why when I select LPG on the switch it dies instantly.. But if I press my foot to the floor and back right off it and to the floor and back off fully every half second it keeps it alive albeit sounding like sht.. And as soon as I slow the pedal pushes, or stop the engine will konk out completely.

It shows as 3 bars of lpg and the last owner said the tank was 3/4 full...
It couldn't be out of lpg by any chance.. OR

Could the o2 sensor affect the LPG system, if its running rich it fecks with the LPG computer somehow.. Probably not, but just a thought!!

The lpg solenoids can be heard clicking when I put a voltage through them.. And can hear the tank make a sound when it switches to lpg.

The lights on the switch are :
Top one is red when on petrol
Hold lpg switch, then it switches over,
And when I do the gas pedal up and down thing.. Bottom light is Amber upper light is off.. And shows 3 bars in tank..
It conks out a few times with bottom staying Amber and fuel tank 3 bars..
Then after 3 or 4 goes at this the top light flashes red.. And stays flashing red..

Photos below..
And a video at this link :






Cheers folks

There is one o2 sensor in front of each catalytic converter, pretty easy to spot from underneath.
When was the lpg system last serviced?
You need to sort the sensors and get it running right on petrol or you've got no chance. Before you replace them, check the connectors are good and clean

kermit_rr said:

There is one o2 sensor in front of each catalytic converter, pretty easy to spot from underneath.
When was the lpg system last serviced?
You need to sort the sensors and get it running right on petrol or you've got no chance. Before you replace them, check the connectors are good and clean

Click to expand...

Am I right in thinking there are 4 o2 sensors in total?
I have seen the location of these ones around the CAT, just unsure which bank is on what side. Guess I could unplug them and run the scanner to see what error pings up to narrow it down, but I'm lazy and thought Id ask first
I have no idea when the last lpg service was, that's on the to do list, just there's nothing local in Glasgow I'm aware of, think Stirling is the nearest I know of.
Even with the o2 error I'd still been getting roughly 20 to 24mpg on the motorway in cruise control. Getting some black exhaust deposits on the ground behind the car though.

Cheers for the input buddy

There's just 2 sensors in total

Go fill the lpg tank up, it's empty. You never go by the lpg gauge iv never known a single 1 to work

Didn't bother fitting a gauge when I converted mine.
Just go on mileage from a full fill to determine when to refill.