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So the 134/135 are correct these are the O2 sensors upstream of the cat/s. Only US spec discos have the downstream sensors so no need to worry there.
Given where they are plugged to the harness it might be worth checking (he says knowing he won't have to suffer it) but a missing signal on BOTH sides is strange, unless as I said the gas system does something with them and it may not be reconnecting them when it returns to petrol operation (though the fault will probably still be there but you may be able to program the scan gauge to take either an external signal from the ECU on gas/petrol changeover or have a single button reset for when changing over.
If it has no O2 sensing then you won't have true adjustment of fuel levels vs air in based on resultant gas out.
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Based on what 'offtrack' PDF files says they might also be cold. Apparently they work better when warn and I was 9'c when I sit he'd on the scan gauge to take picture for Pedro.....if still there I'll try the petrol idea...thanks.
Talking about the cold ... my trucks Electronics hates the cold...below 5'c I don't have the speedo etc working...I think even the ABS is out..until the engine bay warms up which may take 3-5minutes driving....does yours do the same?
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Truck? What truck?
Had no cold issues, had it down below zero. Just hate having to cold start it. Wishing for drysump system and pre heater/oiler.
Left wing suggestion but I have seen it in a normal system. The ABS might be related to the age of the fluid and water content. It might be gelling or freezing inside the ABS module. Time for a change?
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The kids call my 99D2 ' the truck ' - they are small in comparison.
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People have been calling (attempting to anyway) our Rovers trucks for years. Much to my dismay.
I tell them trucks travel thousand of miles reliably and economically. Land Rovers don't.
