So I'm looking for a LC and this LX450 has had my attention for a few weeks. It's got 186k miles, been in Mass most of its life. Not a perfect car cosmetically (some dings, dents, scuffs etc little bit of rust on paint) but frame is good and seems to drive fine, the guy wants 3700 for it. Anyway on my second drive of it he had already had it running before I got there and the CEL was on. He said it was probably the gas cap but I had him run a scan and these codes came up. I think they might be all related but searching here I see the p0171 could be a vacuum leak. I'm just trying to get as much info as possible before I purchase. Thanks fellas