Got some DTC's after cam install
 

I have a 2000 6 speed Z28 and just did a cam install, i know some of what the codes are, but theres a few that has got me. Heres what i got Pacesetter headers Non-emission that should be the problem for a few of the codes. No rear o2, im waiting to do a dyno tune so i will have the fixed then. Also all the EGR and AIR has been removed, But i will list all and maybe you guys can help me :

P:0121 - Throttle Pos. Sensor/Switch A Circ Range/Perf -- Whats that mean?

P:0135 - Oxy Sensor Heater Circ bank1, Sensor-- Whats that???

P:0140 - Oxy Circ No Activity Dect. Back1 Sensor 2-- Thats the rear o2's

P:0160 - Oxy Circ No Activity Dect. Back2 Sensor 2-- Same as above

P: 0300 - Random/Multiple Cylinder Misfire Dectected-- Is the cam causing this???

P: 0327 - Knock Sensor 1 Circuit Low input Bank1, 1 sensor-- Whats this mean???

P: 0405 - EGR Recirculation Sensor A circuit low-- The Egr has been removed form car thats the issue here.

P: 0412 - SEC AIR Injection System Switching Valve AICR ERROR- All the AIR has Been Removed Also, I think thats whats causing this

P: 1404 - EGR Closed POS PERF-- Again EGR has been removed

PLEASE CHIME IN

P:0121 - Throttle Pos. Sensor/Switch A Circ Range/Perf -- Whats that mean?

P: 0300 - Random/Multiple Cylinder Misfire Dectected-- Is the cam causing this???

P: 0327 - Knock Sensor 1 Circuit Low input Bank1, 1 sensor-- Whats this mean???

Thats the ones im worried about, the others i kinda think i know what they are.

Will A Tune Help??

I can't see how a tune could hurt.

a tune will get rid of all your troubles, if you can find someone with HP tuners, you can change the parameters that cause many of those codes

Yeah i talked to my tuner today and he said to fix the 1 o2 code and the knock sensor and he could handle the rest