Engine management light came on ,, 306 hdi

[barnesy213]

I've took the clip off the sensor and there's not dirt in there what so ever... However. When it's cold is when the tps plays up but after a mile or 3 down the road it seem to sort it self out but after a while it will go back to playing up again. I'm in 2 minds weather to just replace it and have the fault code cleared or set the car alight because how can it work one minute and not the next. ( the management light has been on all the time )

Any ideas ?