Ok I have 2003 MPV and it is running rough. The engine light came on but has been running ok until a couple days ago. The Mileage went in the dumper a quite awhile ago. I bought a Code reader but I need a bit of help cifering out what exactly they all mean.

I figure the P0421 is that the Catalytic converter may be bad.

the part I am not sure if is which O2 Sensors are which What does Bank 1 Sensor 1 mean? Is this the sensor front Radiator side in front of CaT or Back Side front of CAT.

Also is Bank 2 Behind CAT?

I want to make sure I get the correct parts I need to fix the problem.



MIL DTC
P0421
Warm-up Catalyst Efficiency Below Normal (Bank 1)
Pending Codes
P0131
HO2S-11 (Bank 1 Sensor 1) Circuit Low Input (No Inversion)
P0151
HO2S-21 (Bank 2 Sensor 1) Circuit Malfunction
P0300
Multiple Misfire Detected

Now I have one other Question.
If I have to order a CATALYTIC Converter is there only one on the 03 MPV and if so is the 3 bolt Inlet 2 bolt outlet bolt in model the correct one for my application?


Thanks 1000 times over in advance for any help.

Todd Fiebranz
Damin69