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i recently upgraded my exhaust with 2.5" straightpipe from the turbo back. i have gotten 3 different c.e.l. codes so far, [p0030][p0137][p2097] all of which have to do with heated 02 sensor, or improper post catalyst trim. im using trifecta's "ez-flash" to clear AND manually turn off the codes...

idk if someone already sticky'd this, but here we go.

new to the page. ive been on here for a while, but finally think im starting to get somewhere with my sonic. this is a work in progress, (not sure it'll ever be done). well,,, 2013 1.4t lt hatch PERFORMANCE: (in order i got them) zzp intake trifecta select a tune forge recirculating b.o.v...