Hi all,have a bit of a puzzle going on.i have a 2003 4.4 v8 petrol L322 with a prins LPG system.my issue is that I get an engine management light come on ,I read the code which shows p0056 .the code points to bank2 O2 sensor on the exhaust .ive noticed that when I'm low on fuel it stays on,but the minute I fill up on both LPG and petrol the light goes out.can anyone suggest what could make this happen or a possible fix.kind regards in advance to anyone who can possibly offer some advice.

Does it come on at the same time as the petrol light? '55 Java Black Vogue

I haven't fuelled up separately so I'm not sure what causes the light to extinguish .should I run it on petrol then switch to LPG ,or should I try it the other way round.again any info would be great.regards .tony

It doesn't come on at the same time.