I do have long tubes and I have tunes from two well known companies and both told me to go back to the place I got my exhaust and tell them my cats are bad. So p0161 talks about the driver side and p0141 is passenger? I was told it was the opposite. With one of the two companies tunes I was throwing codes without a cel, can they turn it off in the tune even though codes are thrown?
Yes, the thing with those codes is that they are heater related, those codes are thrown if you have your rear sensors disconnected, or bad sensor/wiring. These are narrowbands that use 4 wires, 2 for the heater, 2 for signal. The heater use a positive wire that comes from a BEC fuse (47, think) and the PCM uses the switched ground to control it. The other two wires are for signal. They are separate circuits, both monitored by the pcm.
I would check that you have the correct sensors on the correct connectors, fronts are green, rears are blue, sorry to say this but I have seen any combination you can imagine, inverted fronts, blues on a side and greens on the other when people do header/transmission work. Also would check the wiring harness because if sensors are correctly plugged and you still get these codes, there is a harness issue, a point to point check would help.
The CEL can be turned off in the tune. You can do both, just the CEL or the code altogether. (some codes)
Yeah, I pulled off the pipe and sent pictures of the cats from the top of the pipe over to the exhaust company. They told me the cats didn't look bad so I was sent the restrictors which solved the lean and rich codes, but still no resolution on the 02 sensor issue. I'll give Ford a call tomorrow to see if they can shed some light on this. As far as tuners being able to mess with the rear 02's I've been told by them that all they can do is either turn them on or turn them off and they don't have the ability to do anything else.
No, if using SCT hardware, there is something else to be done.
