Joshua Burts

So, as the title mentioned I'm having some trouble with my a6 throwing these 2 codes on a cold start, I cleared my codes after I had noticed I had a misfire and replaced my coil packs and plugs. Seemed to eliminate the issue for a couple days. It returned today, same two codes, seems to idle a little wonky until it's in operating range.

it has a weird clatter sort of sound when it first starts from like deadline cold (wasn't ran for at least 12 hours)

raj99

Welcome to the forum. What year if you A6? Your codes are pulled through a generic tool, which are usually pretty garbage, try getting your vehicle scanned via a VCDS tool. Lastly, try the following:
https://www.autocodes.com/p0492_audi.html

Could be an air leak issue.

Joshua Burts

Hey man, thanks for the tip, I'll try listening around a bit under there see if I can catch a leak with some soapy water. Shes '10 so shes still relatively newish. Most of my hoses lool rather fresh. I'll see about getting a vcds scan.

raj99

I wouldn't use soapy water, especially if it's a vacuum leak...you know where that water will go, it's not the same as a leak in your tire which will bubble up. Smoke test would be the best, but you really need to get a better scan to even really begin problem solving.

Joshua Burts

Lol.. you hold an valid point. 😂😂 thanks I'll see if I can get a vcds