Hello everyone, i'm a new member and would like to ask for some advice.

My 2016 C4 was recalled to have the cat replaced under warranty. Whilst at the garage i asked if the recently illuminated warning light showing a DPF fault was anything related and was advised that it was not. I went to another independant garage that i've used before and asked them to clear the errors, DPF and sensor, to see iof they returned after the new cat was fitted and they have. The garage also told me that a client of theres who was a motoring journalist had exactly the same problem which was fixed under warranty when he rejected their arugument that the two issues were not related, The garage tells me that the sensor is expensive so i'm reluctant to replace before i'm sure but i find that a car with only 34000 should have this issue. The garage also cleanded the DPF which i omitted to mention.

Any advice would be gtreatly appreciated.

Alan