Cable strand clio

Hello guys, I have nen clio 2, 1.2 16v bj 2001 and engine d4f 712. He has a problem that is only possible with full throttle only 50kmh. Error reading resulted, gaspedal Poti error(sporadic) , Lambdasonde error and another. The man from the workshop meant motor harness replace then everything fits and errors are gone. Does here by chance such a strand or other tips? Part number would be 8200346202, is nowhere available. Or renault has changed the part number. a catalogue of parts or something. Thank you in advance