2000 Toyota Corolla Car suddenly slowing down

If the temp guage is creeping up I would suggest that the catalytic converter is somewhat plugged.

My car's temperature gauge is always slightly below to middle even in a long drive.

Yesterday, I checked air filter and it is looking white. I don't see any dust on it.

I think I may have to get fuel pressure checked.

Before I get it checked, I will take OBD codes from 'Advance auto parts' shop and will let you know.

Thanks a lot for trying to help me.

I just got it checked for Error codes. I inserted the machine into the OBD while ignition is ON and engine is not running. Please go throug below codes and let me know if I can try anything:

Error Codes: 2

P0133
O2 Sensor circuit slow response (Bank 1 Sensor 1)

P0133 Pending
O2 Sensor circuit slow response (Bank 1 Sensor 1)

I/M Monitors:

Misfire monitor > OK
Fuel system Monitor > OK
Comp Component > OK
Catalyst Monitor > OK
HTD Catalyst > N/A
Evap System monitor > OK
Second air system > N/A
A/C refering monitor > N/A
Oxygen sensor monitor > OK
Oxygent sensor heater > OK
Egr system monitor > N/A

View Freeze frames:

DTC that caused freeze frame > P0133
Engine RPM > 612 rpm
Load value > 20.0%
Coolant temp > 186 Deg FAH
Intake air temp > 53 Deg FAH
Short term fuel trim1 > 0 %
Long term fuel trim1 > 16.4 %
Short term fuel trim3 > -100.6 %
Long term fuel trim3 > - 100.6 %
Vehicle speed > 0 mph
Fuel system 1 > clsd1
Fuel system 2 > N/A

Yesterday, when I went for 25miles drive. Suddenly, engine light popped up. So, I checked error codes again. I erased codes and checked again and the output is as follows:

Error Codes:

None

I/M Monitors:

Misfire monitor > OK
Fuel system Monitor > OK
Comp Component > OK
Catalyst Monitor > OK
HTD Catalyst > N/A
Evap System monitor > Inc
Second air system > N/A
A/C refering monitor > N/A
Oxygen sensor monitor > Inc
Oxygent sensor heater > Inc
Egr system monitor > N/A

View Freeze frames:

None

What is INC?

After erasing codes, I didn't see any codes. I tried 3 to 4 times but I didn't get any error. Also, engine light is turned off.

Do you think that there is no problem with my car, now?

Yeah. Sure. I will let you know if I find any error codes again.

Thanks to all for your help.

Is it? Everytime, I'm filling up gas at 7Eleven which is near to my home. I used to smell the smoke something different. Also, I used to get less MPG which is less than 24MPG which is not usual for Corolla. I should get at least 28MPG in city and 32MPG on highways.

For the first time, I went to "EXXON mobil" to fill gas tank.

I felt that car is going smooth than before. I don't know whether it is because of resetting codes or good gas.

Let me check MPG this time and will let you know.