simpsons721

I have code 71 egr

what does the egr control?

if i fix this what will my car do better?

my car currently reads as low oil pressure when running after 5 minutes and feels it runs hot but gauge reads normal

please help

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94 4runner 2wd 2nd gen 4runner 3.0 V6 3VZE

131,000 Miles

I need all the help i can get i want to match the guy in the forum with the pic of 333,333 milege