2005 Nissan Altima code p1272

Question

I have replaced the exhaust manifold with catalyst and upstream and down stream o2 sensors as a/f sensor and I still keep getting a p01272 code what else is there to change? Originally I replaced the exhaust manifold because I was getting a po420 code after all the parts were replaced I get po1272 I also replaced the spark plugs and added fuel injection cleaned to the fuel

Answer 1

P1272 mean you have a rough idle try having your high and low checked out or the solenoid replaces but remember the problem might not be electrical it could be hydro- mechanical