Te Tai Tokerau MP Hone Harawira has been told off by elders in the Far North for using obscene language.
The Maori Party MP has made comments about other party members in forums such as the social networking site, Facebook.
Joe Everitt, an elder from Murihiku, which represents five Iwi, says about 50 kaumatua have met Mr Harawira and aired their disappointment at his language.
Mr Everitt says Mr Harawira is articulate in Maori and English, and he needs to be polite in both.
He says Mr Harawira took the advice on board.
Mr Everitt says he's also disappointed that Titewhai Harawira, the MP's mother, has bad-mouthed Maori Party co-leaders Pita Sharples and Tariana Turia.
TV appearance seen as no barrier
Mr Everitt told Morning Report on Monday that Mr Harawira's decision to appear on the Marae Investigates TV programme over the weekend should not affect the outcome of disciplinary action being taken against him.
He said he was not disappointed by Mr Harawira's appearance on the programme.
Mr Harawira appeared in a long, and at times tearful, television interview.
Mr Everitt said it shows a different side to the MP and displaying humility does help people.