Question for those running rear o2 sensors as front
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Question for those running rear o2 sensors as front
I did the re-pining of the ecu and have been running my rear 02's as the fronts and gotten the rears tuned out for half a year now and its been no problems. But this week I got a bad 02 sensor code on my passenger side so I'm going to have to replace it. But I'm unsure if I should be replacing it with pre-cat or post-cat stock 02 sensor? I read their the same other than length, which is no problem but I wanted to be sure I shouldn't be running the same rear pre-cat 02 sensor, or just any sensor.