I have an 03 Cobra with smaller blower pulley, diablo tune and added Bassani X-pipe while back.

I've been throwing a P0153 trouble code Slow Response from O2 Sensor. I'll clear it and drive it for some time and it'll eventually come back.

Is more likely because of the mods I've added, or an actual problem with 02 sensor, exahaust leak, or Mass Air sensor?
I just do't want to go off chasing the problem in the wrong direction.

Any help is greatly appreciated.

Thank you.

 

I dont throw them codes. Im thinking its your O2 sensor is all crudded up. is your car running rich or have you run alot of race gas thru er?

 

I can check that code when I get back to work on monday. I don't know it off the top of my head.

 

just got rid of that code on my wifes 03 GT with a good cleaning of the mass air sensor and air inlet tubing

 

Thank you guys for the responses.