Was driving the car last Tuesday, and the EML came on, got the codes read the same afternoon, and it showed the 171 fault.
The car was driving fine.
Got the code cleared, and it lasted a week, the light came on again last night.
Car still driving fine.
Having done a search, it is mixture too lean, and solutions range from a service to clean maf to new maf to split hoses.
Just wondered if anyone had any other ideas as to what might throw up the fault but not cause the car to perform differently ?