P0420 Error or is it?

[stevenK Junior Member Find all posts View Profile Close stevenK]

Hi Guys,

I have had my 120 Series for a couple of weeks now, when im running on LPG I get the P0420 Error - Lamda 02 Sensor ( Post Cat) , when I clear the error with the obdII tool , and run on petrol only , no error appears. soon as I go back to lpg error appears again.


any ideas?

[gazgofishing Lurker Find all posts View Profile Close gazgofishing]

Depending on the gas system. It is more than likely a lean mixture.

[stevenK Junior Member Find all posts View Profile Close stevenK]

Thank you