u/ninjallr

Hi, I've got a Civic Sport (EP2) that's bone stock (D16V1). I've been considering doing some minor things like getting an intake and exhaust at some point in the future. I know some people run headlight intakes and I do think those look cool but they're probably a bit impractical for a daily. However, I do have some gaps in my bumper (circled in yellow) that I believe are used for optional foglights. Since I don't have foglights I was considering using one of these holes for an intake (seems someone else has had the idea because I found a scoop on eBay). My main query is, since I live in the rainy UK, is the lower end of the bumper too low for an intake and risky for water ingress? Pics attached to hopefully make my point clearer.

Hi all, for context I've got a 2005 (facelift) EP2 Civic.

Since I got the car I've had a bit of a rattle from the heat shield, and this got significantly worse back in March. Not long after this issue cropped up, my check engine light came on. Took it to a mechanic to get some other unrelated work done + sort out the heat shield and check the error code. Mechanic removed the heat shield and said that the error code was to do with the O2 sensor in the exhaust. He cleared the code and said it could be due to carbon buildup so advised revving a bit more than usual to clear it out and left it at that. All was fine after that point until this week.

I was driving and got caught in traffic during hot weather. While I was sat in traffic the check engine light came on again. Thankfully I now have an OBD2 scanner, and so could check the code myself. It was throwing P0141 which is apparently an issue with the secondary O2 sensor heater circuit. I figured I'll just rev the car more as advised previously and carry on. I cleared the code and it was fine for a couple of days, until again when I was sat in traffic idling with the AC on. Note as well, that I was idling without the AC on for a while and I had no issue, however not long after turning it on, I had the check engine light come on again.

I've had a bit of a look into this but I'm very new to working on cars and diagnosing issues so I wondered if anyone had any pointers or advice (besides just avoiding using the AC because I don't deal with heat well lmao). It's looking like it's something to do with the extra power draw from the AC affecting the O2 sensor, but I've not got much clue on how to fix that, or if that's even the actual issue.

TLDR: P0141 code (O2 sensor heater circuit malfunction for bank 1, sensor 2) is being thrown after idling with AC on.

Is this too low for an intake scoop?

Secondary O2 sensor error code (P0141) being thrown when AC is on and car is idling.