Recently I installed a CTS Turbo testpipe with my AWE downpipe and AWE quad touring exhaust. I mounted the o2 sensor spacer on the 2nd part of the testpipe. I then also had to replace my MAF sensor also, so I plugged the new one in and started the car with my IE Stage 2. The CEL, TPMS, Park brake and Stab control instruments went off. I checked and it threw the code "P0100". Tried replugging in my new MAF sensor, no luck. Any ideas on how to fix the CEL along with other instruments?