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Message: <blockquote data-quote="Wes8398" data-source="post: 411035" data-attributes="member: 9883">Last week I was getting codes p0175 (system too rich), as well as p0133 (o2 slow response bank 1, sensor 1), and p0153 (o2 slow response bank 2, sensor 1). Months before, I had put new REAR o2's on; so last week I swapped the newer o2's that I had put in the back, into the front, and put the "worn out" ones from the front into the back. The car had been CEL free for almost a week, until last night. I pulled the codes this morning and this time the ONLY code I have is the P0153 code. No more P0175 or P0133 - so it's an improvement at least. If I'm correct, this is a code referring to the passenger side o2 sensor, closest to the header. This was a sensor that I had to repair wiring on when I swapped them from rear to front. It musta got caught up in the driveshaft yoke or something when I had it installed in the rear o2 spot, and it had a frayed wire which I cut, stripped back, used a butt connector, and reconnected and taped up. Do you think this wire is what's causing the code? Or is it likely to be something else? Consider that the other 2 codes I was getting before are now not present. Only p0153. Thanks in advance. PS Freeze Frame info from P0153:- closed loop- 42% load- 199.4 degrees- Bank 1 short term fuel trim - minus 1.56% (last week was minus 3.91%)- Bank 2 short term fuel trim - minus 3.13% (last week was minus 0.78%) - Bank 1 long term fuel trim - minus 7.03% (last week was minus 8.59%)- Bank 2 long term fuel trim - minus 4.69% (last week was minus 16.41%)</blockquote>