Voltage too low on first O2 sensor, bank one. Comes on one day, few days go by, goes off. Comes on again few days later, goes back off, now it is back on. What's the damn deal? Should I replace? Performance hindered with SES on? My brother has an LT1 with Moroso CAI, free mods, cutout and CC 246 (?), not sure. But I will be racing him friday and want to put the own on, .

Blake