Have a 1991 2.3 dual ignition manual 5 speed and I'm getting codes such as 334 which is EGR valve position sensor closed. Code 22 which is manifold pressure sensor. Code 629, clutch solenoid circuit failure. And code 566 which is shift solenoid circuit failure. Now I'm wondering is one of these causing all these or what because it's gonna be 204 bucks to replace all of these and I figured I should do some research to see if it's one of these and just replace that instead of all of them. Thanks for all your help guys!