audi a4 throttle body

[nyaudiguy]

i own an early model 98 a4 2.8 quattro im getting a bunch of codes one is throttle body fault basic level intermitten the second is bank 1 too rich third is bank two too rich there was a fourth i think it was load level intermitten. what could this b my temp gauge runs cold but the termostat is working te vag says its running 90 c i was told it could b the throttle body. can some one help me with other signs to look for to kno for sure it the throttle body or give me some recommendations on whatelse to look at thanks guys