I have an 08 crv that suddenly started sounded like I had a modified exist a few days ago. Was just a tiny bit slower accelerating than normal, but the noise disappeared when I reached a steady speed.

Then the next day, only at idle, a sound coming from exhaust that I'd describe as rocks in a coffee can, very loud, embarrassing etc... Disappears as soon as I hit the gas.

​​​​​​The next day, check engine light appears. Hurry to get it read, P0141 (bank 1 sensor 2, O2 sensor). After driving for about 20 minutes it disappeared. I've ordered the downstream O2 sensor to make the repair tomorrow. But does all this sound right for a P0141 code, or am I just fixing one of many things going on here? All the wires appear to be fine for that sensor.