What does the code p0175 and p0172 means on a 200

it's not a letter o (oh), it is a number zero (0)

All available on Google and better to include 'year make model'

So

year make model P0193

Diagnostic Trouble Code (DTC) P0193 stands for "Fuel Rail Pressure Sensor "A" Circuit High." It is logged when the PCM perceives that the signal from the fuel rail pressure sensor exceeds the calibrated limit over a specified amount of time.Aug. 24, 2021

P0193 Code: Fuel Rail Pressure Sensor "A" Circuit High

P0175 OBD-II Trouble Code: P0175 System Too Rich (Bank 2)

https://www.yourmechanic.com > Articles
P0175 indicates that the Engine Control Module (ECM) detects too much fuel and not enough oxygen in the air fuel ratio (AFR). This code will set when the ECM ...

P0172 OBD-II Trouble Code: System Too Rich (Bank 1)

https://www.yourmechanic.com > Articles
P0172 indicates that there is too much gasoline being detected in the exhaust gases exiting the combustion chamber. The ECU uses a number of instruments, such ...

P0172 LEXUS - System Too Rich Bank 1
Possible causes
Faulty front heated oxygen sensor
Ignition misfiring
Faulty fuel injectors
Exhaust gas leaks
Incorrect fuel pressure
Faulty Mass Air Flow (MAF) sensor
https://www.autocodes.com/p0172_lexus.html

http://repairpal.com/OBD-II-Code-P0172-and-P0175

Fuel pressure regulator , leaking fuel injectors What Can Cause P0172 P0175 Rich DTC Diagnosing to Win with Fuel Trim

oil gauge
check oil level
replace sender
replace oil filter
if no better check engine oil pressure
with gauge when hot
could be worn oil pump or bearings


EFI fuel system running too rich

first clean maf see if it improves

bank one
https://www.obd-codes.com/p0172

and bank 2

https://www.obd-codes.com/p0175

sell it to highest bider

Peter. The dealer did diagnose the problem. They said the car needed all 3 oxygen sensors replaced. They were replaced and the car is now returning codes p0172 and p0175 which are the only 2 codes coming up when the check engine light came on. My question is if the dealer sold me the incorrect oxygen sensors could this cause the computer to incorrectly set the p0172 and p0175 rich fuel mixture codes. There are no other codes coming up. My plan at this point is to check and clean the MAF, check my fuel pressure, and also the TPS but I did not want to waste my time if it could possibly be that the new oxygen sensors where the problem. Any help would be appreciated.

fault codes stored in your car lead to check engine light on, you can get a code reader to clear it.elm327 can have a look, maybe can suit for your car.

P0172 is a trouble code that is set when the ECU senses that there may be too much gasoline present in the air-fuel mixture of the engine. A proper air-fuel ratio of about 14.7:1 is vital to obtain maximum engine power and fuel economy

The fuel mixture grows rich and eventually, the code sets. An "over reporting" Mass Air Flow Sensor can be a common cause of a code P0172 and P0175. Essentially, this means that the Air Flow Sensor is telling the computer that much more air is entering the engine than actually is.

p0172 is system too rich bank 1 and p0175 is for bank 2. this means that you need to test and replace sensors, tps, idle mixture and maf

Unclip the 02 harness, then take out the 02 sensor. 5 minute job.