I installed my stage 2 kit about a month ago, and after about 2 weeks my check ing light came on with P0132 (02 1/1 High Volt) so i reset the pcm and it was fine for about 500 miles. Last night it came on again, and i noticed my idle had a few more pop's in it. Im going to replace my o2 sensor but i was wondering if maybe my stage 2 cause something?

 

How many miles? Ever run leaded fuel? I doubt it has anything to do with the stage 2

 

It has almost 30k miles on it never had anything but 93 in it.

 

The O2 sensor probably has just had its day. I've read that with lower thermostats that the O2 sensors burn out faster since the heater stays on longer.Not sure about how much truth there is to it.But replacing that should clear it out, it is in fact unlikely that it has anything to do with the S2.