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code P0420 and P0430 was displayed few time, i removed it with the predator
today another code was displayed P2098
is it something dangerous for the engine and how can i remove those codes permanently.

mod: arh long tube headers, high flow cats, magnaflow catback, cai, diablo tune 93 cai

thanks

Not dangerous. Those are all related to your long tubes and probably more so to your high flow cats. The PCM compares the readings from the front and rear O2 sensors to monitor cat efficiency. If it's out of range it throws those codes. They are informative only (you won't pass emissions). You probably want to disable your (rear) O2 sensors. You could remove the rear sensors, leave them connected to the cables and strap them up under the car, and plug the bungs. Or you could try just installing plug anti-foulers on the rear sensors. That works sometimes.

Use the Predator to turn off the rear O2 sensors.

if i turn off the O2 sensors, what will happen to the fuel / air management ?

You are only turning off the rear 02's not the front ones, the rear are just there to make sure the fronts are working properly. The pcm does not use data from them to correct your a/f, it only uses the data from the front ones.

mikel wrote:Use the Predator to turn off the rear O2 sensors.

How??