On my way home, the codes popped up.
P0172/P0175 It was a 10 mile drive in cold temps, 30F. It was colder this morning, 25F. The last time these codes popped up, it was a year ago in cold weather too. I reset them last time, they didn't come back until today. It took almost all 10 miles to get to the temp middle point. No traffic due to weather, so highway speed and 40+ MPH on side roads. The drive this morning was slow due to snow and ice patches.
Are these codes common in cold weather? The intake filter is about a year old. Time for a new one. Mahle filters are used for intake and cabin.
Codes are reset so I'll see if the SES light comes on again. It passed emission testing last month, so registration is no problem this month.