Right so, the OBD reader returned three fault codes:
16804
17978
16556
The first one, 16804 isn't in the accompanying booklet, but Google suggests that it is "Catalyst System; Bank 1: Efficiency Below Threshold"
The second one, 17978 isn't in the accompanying booklet, but Google suggests that it is "Engine Start Blocked By Immobiliser"
The third one, 16556 is in the accompanying booklet, and it is "Fuel Trim: System Too Rich: Bank 1"
I am not concerned about the second one regarding the immobiliser, as the engine starts and runs fine, there have been no issues with the immobiliser, and I think it may have happened when I had a third party key programmed for the car.
So looking at the first and third ones then:
16804 - Catalyst System; Bank 1: Efficiency Below Threshold
16556 - Fuel Trim: System Too Rich: Bank 1
Any ideas? I'm guessing that 16804 is that lambda sensor, or could it be the cat? Is 16556 likely to be related and/or possibly the cause of 16804?
Should I clear them and see if they come back, first off?