[Chrysler 200s2013]

I get code p0171 out of a blue feels like the car is suffocating when hitting the gas and gas consumption is down to 10 MPG.
I only changed the injectors so far and rest code. Still after a couple of miles now it came back with same error

 

[ggoose]

Check out this link. Note the link may note chrysler, but the tech has not worked much on chryslers. They note MAF sensor (mass air flow) but chryslers use a MAP sensor (manifold absolute pressure). The diagnostic steps are ok though. I would tend to rule out the fuel pump/pressure as it would affect both bank 1 and bank 2.

p0171 chrysler Code - Fuel System 1/1 Lean

With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the

www.engine-codes.com

It would be very beneficial to have a scanner that will let you see the various engine parameters, for example, the short term and long term O2 sensors.

Note if you are replacing the O2 sensor use OEM/NTK only; no Bosch but Denso has been known to work.

 

[200_S_AWD]

Were you able to solve the P000B cam/crank sensor code?
Go though the Possible Causes listed in the above p0171 link one-by-one until you nail the culprit.
I wouldn't replace any more parts until you can do some diagnosis first.