2002 kia sedona code po431

Those are your only codes? you really shouldnt have drilled out your cats, its hard to diag an 02 sensor online. a scanner could show if they are functioning properly. It might be an issue with your cats though and require replacement.

I would recommend a scan test on the ECM to see if any trouble codes are there and point you in the right direction. The MAF sensors on thesr vehicles are problamatic and cause throttle actuator to go into limp mode. Unplug the MAF sensor and see if it makes any difference

according to my date sheet Code P0 431 indicates that the Warm up catalytic converter, bank 2 - efficiency below threshold - probable cause - Catalytic converter, wiring, HO2S 2. but as you haven't stated which engine I can only give you what it states, it should be the same anyway.

You need a new Catalytic Converter on Bank #2 This code is for low warm up efficiency on the Cat. for that bank.

The answer to your first question is the Oxygen sensor bank 2. Its the oxygen sensor after the catalytic towards the rear of the motor. For the other DTC there is no P01159 DTC, P0159 is Bank 1 Sensor 1 Oxygen Sensor bad, P1159 is an air intake leak or a MAF (Mass Air Flow Sensor leak)

A code P0431 may mean that one or more of the following has happened:
* The catalytic converter is no longer functioning properly
* An oxygen sensor is not reading (functioning) properly
* There is an exhaust leak

Possible Solutions:
* Inspect for exhaust leaks. Next step is to measure the voltage at the oxygen sensor on Bank 2. In fact, it would be a good idea to test each oxygen O2 sensor while you're at it.
* One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It's worth checking into.

Keep us updated and remember to rate thsi answer.

CODE P1159 INTAKE MANIFOLD AIR CONTROL ACTUATOR CIRCUIT MALFUNCTION. CODE PO431 - WARM UP CATALYTIC CONVERTER BANK 2 EFFICIENCY BELOW THRESHOLD CODE PO122 - THROTTLE POSITION SENSOR OR ACCELERATOR PEDAL POSITION SENSOR LOW INPUT.

i dont know if it is but the cost to replace it shouldnt be more than 300$

catalytic converter fault, I would try to replace the o2 sensor first because the cat cost just about $500! I know it is the sensor after that cat and I am pretty sure it is for the back side of the motor.

Good luck, I just replaced all o2 sensors and still got that code and I just purchased 2 cats- Big Money Problem!

hi
P0431 :- (warm up catalytic converter bank 2 - efficiency below threshold )
test the catalytic converter it locate in exhaust gas pipe
test the heated oxygen sensor in exhaust gas pipe too near the engine
P0446 :- (evaporative emission (EVAP) system , vent control , circuit malfunction )
test wiring , EVAP canister purge valve , ECM engine control module
just ask for more abut DTC