Hi I would like some advice, I have a RX300 year 2000 which is converted to Lpg. The car has been converted for about 25k with no problem exept we keep getting fault code P 0420, we had the cat changed by lexus dealer which stopped the problem for about 12k but it has returned.
The question is does lpg destroy cats and can we fit an o2 sensor simulator to fool the car into thinking that the cat is ok. The car has just passed the mot at lexus today so i guess the cat isnt to bad but the lights on dash are annoying. Thanks for any help