[Lee Cope]

Hi From England,

first off can i say i love the videos,

i have a P0420 error on my Citroen c4 1.6 16v petrol, my local mechanic changed the Pre-cat sensor and after 2 days the error has returned, is it likely that the Cat will need changing? said mechanic has said that the ECU might be the fault if the sensor is still reporting as not working, but from your video i have deduced that maybe the sensor was never the fault. car runs fine i just get the error light and Depollution fault on the on screen display (generic fault message apparently) any advice would be sweet

LeeCope3

[Lee Cope]

Hi From England,

first off can i say i love the videos,

i have a P0420 error on my Citroen c4 1.6 16v petrol, my local mechanic changed the Pre-cat sensor and after 2 days the error has returned, is it likely that the Cat will need changing? said mechanic has said that the ECU might be the fault if the sensor is still reporting as not working, but from your video i have deduced that maybe the sensor was never the fault. car runs fine i just get the error light and Depollution fault on the on screen display (generic fault message apparently) any advice would be sweet

LeeCope3

[Author]

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