04 kia sorento runs poorly

code p 0172 refers to system too rich bank 1===causes--intake blocked --EVAP cannister purge valve--fuel pressure---EGR system--injector/s --- HO2S ( heated oxygen sensor in the exhaust manifold before the cat converter and it controlls the fuel mixture)
code p 0038 refers to heated oxygen sensor (HO2S) 2 bank 1--cirdcuit high====causes ---wiring- short to positive -- HO2S--- ECM
at this point the heated oxygen sensor is the prime suspect for the problems

running super rich is a fuel leak problem
check fuel pressure and check the seals of the injectors on the rich bank
use a scanner with the correct protocols to read the codes as there will be fault codes

code p 0171 refers to system too lean bank 1===causes ---intake / exhaust leak---AIR system---MAF/VAF sensor ---fuel pressure / pump/ regulator--injectors---heated oxygen sensor (HO2S)
code p 172 refers to system too rich bank 1====causes ---intake blocked ---EVAP canister purge valve ---fuel pressure --- EGR system--- injectors---HO2S
as the HO2S is in both codes , check/ replace it as it reports to the ECM for air /fuel mixture settings and if faulty it can set to too lean or too rich or swap between the extremes

PO174- too lean bank two --is a possible rich
condition driven lean by the pcm

Check for leaking injectors,vacuum leaks,fuel pressure

Look at fuel trim on scanner

The front oxygen sensors get replaced every 100,000 miles,
so there may be some of the problems

Start with fuel trim,cylinder misfires,spark plugs, injectors, on that
bank, as a place to do your testing for the code

Look at freeze frame data & I/M Monitor activity, to see if the O2
Monitors ran clean & look at O2 data

check the fuel pressure as if this is not correct then this can cause a problem, check running pressures and volume and also check driving pressures as it could be an intermitant problem. then you don`t say if both bank codes were set at the same if so then maf sensor and possibly a problem with injectors could be a problem. but you have to get the codes checked at the time they set and drive around for 1 week or more or you won`t know for sure.

oxygen sensors are not the one who controls your speed however it will monitors your engine how it runs or if thre should be a looses power .if the sensors bank 1 and bank2 received a rich or lean mixtures..it is indicated that you need to check the spark plugs, fuel filter
fuel pump, or the vacuum hoses air flow meter, map sensors,fuel injectors which are need to check to fix the problem...

p 0300 code is for random misfires
random misfires are more from dirty /faulty injectors or low fuel pressure than anything else
have a pressure test done to check pressure regulator , filter and pump operation
use a can of quality injector cleaner or remove and clean the injectors

P0131 - O2 Sensor Circuit Low Voltage Bank 1 Sensor 1 (sensor is before the catalytic converter)

Possible causes- Front Heated Oxygen Sensor Bank 1 harness is open or shorted
- Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Faulty Front Heated Oxygen Sensor Bank 1
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks
P0132 - O2 Sensor Circuit High Voltage Bank 1 Sensor 1
Possible causes- Front Heated Oxygen Sensor Bank 1 harness is open or shorted
- Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Faulty Front Heated Oxygen Sensor Bank 1
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks

I am not really sure what is going on here with the same O2 sensor giving these lean and rich codes, if nothing else is apparent and the engine runs well you may have a defective O2 sensor.

H40 DTCs P1131, P1132, P1151 AND P1152: UPSTREAM HO2S NOT SWITCHING. DTC P1130: FUEL SYSTEM NOT SWITCHING AT FUEL TRIM (RICH OR LEAN)

Diagnostic Trouble Codes (DTCs) P1131 bank 1 (Cylinder 1) and P1151 bank 2 indicate the fuel/air ratio is correcting rich for an overly lean condition. The HO2S voltage is less than 0.45 volt. DTCs P1132 bank 1 (Cylinder 1) and P1152 bank 2 indicate the fuel/air ratio is correcting lean for an overly rich condition. The HO2S voltage is greater than 0.45 volt.
DTC P1130 and P1150 indicate the fuel control system has reached maximum compensation for a lean or rich condition and the HO2S is not switching.
DTC/HO2S Reference List

• HO2S-11 = DTCs P1131, P1132 and P1130
• HO2S-21 = DTCs P1151, P1152 and P1150
Possible causes:
Fuel system

• Excessive fuel pressure.
• Leaking fuel injector(s).
• Leaking fuel pressure regulator.
• Low fuel pressure or running out of fuel.
• Contaminated fuel injector(s)
• Vapor recovery system
Induction system

• Air leaks after the MAF.
• Vacuum leaks (vacuum lines and gaskets).
• Restricted air inlet.
• PCV system.
• Improperly seated engine oil dipstick.
EGR System

• Leaking gasket.
• Stuck open EGR valve.
• Leaking diaphragm.
Base engine

• Oil overfill.
• Cam timing.
• Cylinder compression.
• Exhaust leaks before or near the HO2Ss.
• Check intake air system for leaks, obstructions and damage.
• Check air cleaner element, air cleaner housing for blockage.
• Verify integrity of the PCV system.
• Check for vacuum leaks.

code p2189 and p2187 = air/fuel mixture too lean on both cylinder banks which in turn generates excessive emissions = failed inspection.
What can cause a lean mixture:
- Incorrect main charge signal
- Intake air system leaking
- Fuel pressure too low
- Volume supply of fuel pump too low
- Mechanical fault in injectors
- PCV valve leaks
- Leaks in exhaust system
- EVAP canister purge valve mechanically faulty (hangs open)
All these must be checked.