Code P0420
 

Hey, I posted earlier about this problem, it seems to keep coming back.

Here is the freeze frame data from the obd2 reader:

Intake Air Temperature: 93 degrees F
Throttle Position: 16.4%
Engine RPM: 2792
Vehicle Speed: 60 MPH
LTFT Bank 1: 5.4%
Intake Manifold Press: 10.3 in.hg
Engine Coolant Temp: 170 degrees F
STFT Bank 1: 7.0%
Fuel System 1: Closed loop
Calculated LOAD: 34.1%

I'm not sure what any of these mean. Any help would be appreciated =)

Your primary and secondary O2 sensors are providing readings that are too similar. One or both may be faulty, or your cat is not working properly.

When's the last time you e-tested? What were the results?

Last time I did a e-test I just had it "done" to transfer the ownership over.

I purchased new o2 sensors and a new non-oem cat.

Before I replaced those, I would notice a gasoline smell inside the car and I would only get 350-400km/tank.

Since I replaced those parts, the gasoline smell is gone and I have been getting roughly 500/tank.

I'm not sure if an exhaust leak would cause those readings because I don't know how to check for an exhaust leak myself.