Burning Excessive Oil, Bad PCV?

I recently bought an 2005 2.4 Honda Accord with 132k miles. Everything on the car is well tooken care of except burning oil. Now I did some research and said it could be a bad pcv valve. I have no leaking oil or oil in the intake and the throttle body. I put a piece of paper over the exhaust for a minute, nothing on the paper. The engine light is on saying a bad o2 sensor, replaced that and the engine light is still on. This is really confusing me and putting me in a loop. As they say there's always a reason someone sells a car. Hopefully mine doesn't have blow by or anything.

I recently bought an 2005 2.4 Honda Accord with 132k miles. Everything on the car is well tooken care of except burning oil. Now I did some research and said it could be a bad pcv valve. I have no leaking oil or oil in the intake and the throttle body. I put a piece of paper over the exhaust for a minute, nothing on the paper. The engine light is on saying a bad o2 sensor, replaced that and the engine light is still on. This is really confusing me and putting me in a loop. As they say there's always a reason someone sells a car. Hopefully mine doesn't have blow by or anything. Thanks! I've heard a bad pcv valve can cause oil leaks. I just changed my pcv today. It was 2-3 bucks and just takes 2-3 minutes on a 98 chevy blazer. I've heard changing it annually can boost gas mileage by 2mpg. Mine was old and looked like oil had leaked into it. As for the engine light, i believe codes show and don't disappear for like 50 miles after the problem stops triggering. You can get an obd2 scanner for $15-$30 online or go by an autozone and get your codes checked for free (except in CA). You can get them cleared and if the light doesn't show up again you should be fine. Also, try adding a can of seafoam to 8 gallons of gas for the o2 sensor, fuel injectors, and general maintenance every 3k miles. It sounds like you're losing alot of oil though, i'd be surprised if the pcv valve fixes the entire problem. I'd switch it out and see how it goes, but if it's leaking more than about 1 quart per 2k miles that's a problem in my opinion & i'd consider taking it to a trusted mechanic and have him check for leaks & get an estimate. I'd keep a close eye on your oil until you've got it under control. Then check it about once a month. Are you sure the car is burning oil? If you just bought the car, you might be boiling off water condension in the oil pan that has accumulated over the winter. How about posting the actual code instead of just telling us you replaced the bad 02 sensor? Listening to people with no clue is not the way to try and help that person. Burning excessive oil? What's excessive? The oil and filter should be replaced every 3,000 miles. How much does the oil level go down between that oil change interval? With 132,000 miles on the motor I wouldn't be surprised if you used almost a quart by then.

Are you sure the car is burning oil? If you just bought the car, you might be boiling off water condension in the oil pan that has accumulated over the winter.

How about posting the actual code instead of just telling us you replaced the bad 02 sensor? Listening to people with no clue is not the way to try and help that person. Burning excessive oil? What's excessive? The oil and filter should be replaced every 3,000 miles. How much does the oil level go down between that oil change interval? With 132,000 miles on the motor I wouldn't be surprised if you used almost a quart by then.