Why is my 2007 Nissan sentra 2.0 using 1 qt of oil every 600 miles?

Using about 1 qt of oil every 500 to 600 miles, could it have a bad pcv or other simple fix

its in the gas tank but it doesnt have to be changed!!!YAY

You will need a new catalytic convertor assembly. Yours is below treshold efficiency in other words its "no good".If you have it replaced, ask the garage/dealer to give you the old one back. Its worth some cash if its full. It doesn't matter thet it failed. They are going after the mesh inside of it and that is worth some $$$$. May not be much , but better than nothing.

Check around the oil filter for a gasket leak. It could be a bad pcv valve but I suspect that there would be other problems. Run a compression test as it is possible that a ring has broken and scored the bore. Acceptable oil use is 1 pint in 6000 miles.

Bank 1 means it's on the same side as your cylinder 1
Sensor 1 is the sensor that is located before the catalytic converter.

First of all are you showing the classic sign of burning oil,blue smoke at your exhaust?The oil is going somewhere.If no blue smoke then you are leaking it through a gasket .Oil ,when heated,thins.The leak may not be visible when the vehicle is stationary.Once the oil pump puts the oil under pressure it may be ejected from the engine while you drive.

maintenace and oil filter. i got an oil change last month on my 2007 nissan altima and they did not reset the mileage so the lgiht on the leyboard came on and I cant fix it

None most likely.

When the the amount of probelems gets high enough, they may do something but not likely because the cost of a recall is more than what it costs to Pay people to settle out of court " if it gets that far" or its cheaper to lose a few customers. This is true with any part on a car.

If " A " (the recall) cost more than " B " the average out of court settlement, Then "C", they dont do one.

Even if it causes accident related Deaths.

Most likely the issue is due to too much weight on one side in the back, an alighnment issue, Bad frame desighn or bad parts like shocks and springs.

If its that severe than i would take it to them and explain that you have reciepts for replacing that same tire over and over. get them to look at it at least three times. Be persistant, especially if its under warranty.

Go durring a busy time when theres other customers around. Dont be crude, just make sure other customers can hear yu.

Explain that you looked online and talked to friends at work and have heard of it from other people and read about it online.

After they fineley aknowledge there may be a problem and they try to fix it three times, it becomes a Lemmon and they have to give you your money back or give you another vehicle of equal value.

Keep all reciepts and papers and everything in case it becomes a legal issue.

Good luck.

More than likely u have a leaking valve cover gasket unless your seeing smoke than it might have a burnt valve guide or guides if its smoking real bad than it could have bad rings and you don't want that cause then u half to tear the motor down basically rebuilding the motor