Intermittent power prob..

[audi660]

My S6 has an intermittent power prob, the power seems to be right when the car is cold but holds back as it starts warming up.
The throttle posion sensor doesnt always show full throttle on the VAG. Have changed the sensor with one off my S2 but its still the same.

Also keep getting lambda control limit not reached (intermittent) and mixture adaption limit not reached.

Any ideas guys??

[BRY]

Mileage on the lambda? If it's above 80k get a new one, as that's the service life quoted from Bosch IIRC.
Have you tried cleaning the MAF?