P00F0 error code

[Alfie1]

As per title, this error code has turned up twice now in the last year. I can't find it on any listing but the code reader says something about generic air inlet issue, that also tallies with the spot where it would be if it was in the list of error codes. Anyone have any specific ideas on this one please? It seems to very slightly affect the engines smoothness when pulling. The turbo inlet hose is in good physical condition and is not split.

It's quite likely it will turn up more often now, I've had the car just over six years, it's a 2.2 crd from 2003.

I can erase the code easily enough and it doesn't reappear straight away but it would be good to track it down.

Thanks.

[Alfie1]

A different one today, again not on the normal list - P01A4 - again erase and not returning. Possibly a fraction down on power after it lit up and now back to normal.

Car is a diesel 2.2 CRD