Pdid complete tuneup cam phasers replacd 02 sensors stil getting 0171 code

code p 0171 refers to system too lean bank 1===causes ---intake /exhaust leak---AIR system----MAF/VAF sensor---fuel pressure/pump---injectors/s--- heated oxygen sensor (HO2S in the exhaust manifold before the cat converter)
for this code the most likely fault will be the HO2S unit as it reads the exhaust gas composition and reports to the ECM so that the air/fuel ratio can be corrected
code p 0174 refers to system too lean bank 2===causes -same as for p 0171
fuel trim is what the ECM does after it receives an constant flow of information from all of the sensors and it alters the air / fuel ratio for the new parameters
you will have noticed a change in engine performance and fuel economy when driving at a constant speed over a distance or conversely a loss of economy when reverting to city driving
It also explains the advertised fuel economy figures --one for city driving and a better figure for highway driving

code p 0171 refers to system too lean bank 1===causes ---intake /exhaust leak---AIR system---MAF/VAF sensor/s---fuel pressure/ pump---injector/s---heated oxygen sensor (HO2S) the one in the exhaust manifold for bank 1 nearest the firewall

DTC P1133 HO2S Insufficient Switching Bank 1 Sensor 1

DTC P0171 Fuel Trim System Lean Bank 1

You have a bad vacuum leak or a fuel delivery problem on bank ! P1133 HO2S BANK 1 SENSOR 1998 Chevy Lumina 3 1

could still be a vacuum leak.

I’m happy to assist further over the phone at https://www.6ya.com/expert/josh_8f8ad0a8f7e0e6d3

P2195 is 02 sensor stuck lean ( bank 1 sensor 1 )--check for a possible vacuum leak in all vacuum lines.-- if no vacuum or other leaks could be egr valve. p2196 is the same but stuck rich,p0053 is ho2 sensor bank 1 sensor 1 heater resister all codes are related to the o2 sensor, p0113 is intake air tempurature curcuit high input ( IAT ). check wiring or senser replace if need be. if you can not find any leaks and egr system is ok, then its the 02 sensor causeing this.

These are 02 sensor codes Check for vacuum leaks. also check the vent solenoid on the EVAP system. This can stick open and cause a vacuum leaks.
Let me know Randy

Bank 1 = drivers side (IE: 02 sensor bank1 = driver O2 sensor pre cat. converter)

Hi, 1151 is an 02 sensor code, 1131 is also 02 sensor code,
0174 lean condition bank 2, and 0171 is lean bank 1. Either this is in need of a whosale of repairs or you have computer issues, From looking at the codes i would first do a complete tune up, Including wires, And inspect for a vacume leak before replacing any 02 sensors..
Take care

Check for a lower intake leak somewhere air is getting in on 1,2,3. Check for leaking vaccum hoses also.