brian0918

I have a 1999 Accord V6 that keeps returning code P0420. I'm pretty sure the catalytic converter is bad, because the infrared temp is the same at the front and back of the cat. But I'm trying to determine what else could be bad, such as an O2 sensor. I tried to capture live data but for some reason the Lemur BlueDriver tool isn't giving me access to any of the PIDs. But I can see the freeze frame data when the P0420 code was triggered, and it shows:

PID : Description : Value
04 : Calculated Engine Load Value : 44.7 %
05 : Engine Coolant Temperature : 83 °C, 181 °F
06 : Short Term Fuel Trim Bank 1 : -0.8 %
06 : Short Term Fuel Trim Bank 3 : -100.0 %
07 : Long Term Fuel Trim Bank 1 : 0.0 %
07 : Long Term Fuel Trim Bank 3 : -100.0 %
0B : Intake Manifold Absolute Pressure : 45.0 kPa, 13.3 inHg
0C : Engine RPM : 2044 rpm
0D : Vehicle Speed : 93 km/h, 58 MPH
0F : Intake Air Temperature : 54 °C, 129 °F
11 : Absolute Throttle Position : 16.9 %

So what does this indicate to you? Is it running rich or lean, and how do you tell if either sensor is bad?

Is there actually a Bank 3, or could that just be bad data, and where's Bank 2?

Thanks!

origamy

Does your car really have Bank 3? See readings of Bank 2 instead