No Pentecostal I have ever talked to denies trinity.




Now I have seen some profess modalism and oneness. Haven't looked into oneness but modalism isn't really much different. Really the biggest difference I can see is instead one One God three persons it's one God three modes that he switches between.

Same basic concept.

However whether you believe in the trinitarian doctrine or not does not affect salvation. Jesus didn't say believe in the trinitarian doctrine or go hell. He said believe in me and if you believe in me you believe in him who sent me which would be the father.