2002 Mercury Sable, 103,000 miles.
this car runs well but every now and then while traveling on the intestate, all but two times, it will buck once or twice and stall out within a couple of seconds. It will start right back up again and work fine. It has happend two or three times a month over the past 4 months.

Thank you in advance.

 

My 2000 Sable with 135K miles runs great, except it is rough now on idle, and getting worse.

Engine light is on, codes above were noted.

No vacumn leaks detected.

MAF sensor issue maybe? Or H20S sensor?

I am still new at working on cars, and am trying to diganose this to determine if I need a new MAF sensor or O2 sensor, or something else.

New Fuel pump less then a year ago, and I will be replacing the fuel filter as well (although I replace them about every two years.

Car runs great other than telling me it is rich/lean, and now stalling more when parked or at a light.

Any ideas?