Join Date: Sep 2015
Location: Lindsay, Ontario
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That DTC has nothing to do with the car running or not. You need to check the wiring going to that sensor before swapping in a new sensor. No activity detected usually means that the PCM can sense the O2 sensor is there, but there is no change in the voltage so there is no activity.
As for oil pressure, no, there is no provision for reading oil pressures. All the PCM cares is that there is a minimum pressure, an actual value is not looked for.
2004 Mazda 6s 3.0 5dr. 5spd never ending money vacuum project:
CP-E headers w/catted mid + Magnaflow carback/AEM CAI/3.7L TB/Speed6 springs/RX-8 wheels
AWR 70D Enginemount/CP-E Dogbone/Custom urethane stock trans mount
Ralco shortshifter/Bose w/Auxmod/sharkfin antenna/lots of little things...