Error Code P422

Okay got an error code P422
According to the Shucks Diag Computer it reads this.

P0422 Main Catalyst Efficiency Below Threshold (Bank 1)

So what does this mean replace the catalic convertor?
Anyway this place has helped me out many times so any help you guys can come up with would be great.

Could be an oxygen sensor. What year and how many miles on the car?

IN case you did not get there, this info from kiatechinfo.com
www.geocities.com/lmp4203/kiasport/422description.pdf

Okay got an error code P422
According to the Shucks Diag Computer it reads this.

P0422 Main Catalyst Efficiency Below Threshold (Bank 1)

So what does this mean replace the catalic convertor?
Anyway this place has helped me out many times so any help you guys can come up with would be great.

A cat code like any other code does not say replace the cat or sensor.
It says check it out.
First thing is to check engine running and for missfire or engine running rich.

How many miles on tune up?
Any other codes?
Year make and model and engine size and mileage?

http://www.troublecodes.net/articles/catfailure/

Here is a little info for.
Testing for all or any cat codes
DTC P0420, P0421,P0422, P0430 & P0431: Check Possible Cause Of Misfire DTC P0420 and P0421 indicates bank one catalyst system efficiency is minimum requirement. DTC P0430 and P0430 indicates bank 2 catalyst system efficiency is minimum requirement. Possible causes are as follows: Use of leaded fuel. Oil contamination. Cylinder misfire. Fuel pressure too high. HO2S sensor improperly connected. Damaged exhaust system component. Faulty ECT sensor. Faulty HO2S. Ensure ignition timing is correct. Retrieve all Continuous Memory DTCs. If misfire code(s) is not present, go to next step. If misfire code(s) is present, isolate cylinder and repair as necessary. Check HO2S Monitor DTCs If DTCs P0136, P0138, P0140, P0141, P0156, P0158, P0160, or P0161 were present in step 1), service as necessary before continuing. If none of these codes are present in step 1), go to next step. Check ECT Sensor DTCs If DTCs P0117, P0118, P0125 or P1117 were present in step 1), service as necessary before continuing. If none of these codes are present in step 1), go to next step. If any codes except P0420, P0421, P0430 and/or P0430 were present in step 1), service as necessary before continuing. If no codes except P0420 and/or P0430 were present in step 1), go to next step. Check Rear HO2S Wiring Harness Turn ignition off. Ensure HO2S wiring harness is correctly routed and connectors are tight. Repair or replace as necessary. If wiring harness and connectors are okay, go to next step. Check Fuel Pressure Turn ignition off. Release fuel pressure. Install fuel pressure gauge. Start engine and allow to idle. Note fuel pressure gauge reading. Increase engine speed to 2500 RPM and maintain for one minute. For fuel pressure specifications, see FUEL PRESSURE SPECIFICATIONS article. If fuel pressure is as specified, go to next step. If fuel pressure is not as specified, go to CIRCUIT TEST HC . Check For Exhaust System Leaks If exhaust system leaks, it may cause catalyst monitor efficiency test to fail. Inspect exhaust system for cracks, loose connections or punctures. Repair or replace as necessary. If exhaust system is okay, go to next step. Check For Exhaust System Restrictions Inspect exhaust system for collapsed areas, dents or excessive bending. Repair or replace as necessary. If exhaust system is okay, go to next step. Ć Check Manifold Vacuum Install tachometer. Connect vacuum gauge to intake manifold vacuum source. Start engine and raise engine speed to 2000 RPM. Manifold vacuum should rise to more than 16 in. Hg. If manifold vacuum is okay, go to next step. If manifold vacuum is low, go to step 11). Leave tachometer and vacuum gauge connected. Start engine and raise engine speed to 2000 RPM. On a non- restricted system, manifold vacuum should quickly rise to normal range as increased RPM is maintained. On a restricted system, manifold vacuum will slowly rise to normal range as increased RPM is maintained. If manifold vacuum is okay, no indication of exhaust leak or restriction has been detected and testing is complete. If manifold vacuum is low or slow to respond, go to next step. Leave tachometer and vacuum gauge connected. Remove exhaust pipe from exhaust manifold. Start engineand raise engine speed to 2000 RPM. If manifold vacuum is now okay, fault is downstream from exhaust manifold. Reconnect exhaust pipe to exhaust manifold and go to next step. If manifold vacuum is still low or slow to respond, fault is in exhaust manifold or intake manifold gasket. Repair or replace as necessary and repeat QUICK TEST. Leave tachometer and vacuum gauge connected. Disconnect muffler/tailpipe assembly from rear of catalytic converter. Start engine and raise engine speed to 2000 RPM. If manifold vacuum is now okay, fault is in muffler/tailpipe assembly. Repair or replace as necessary and test drive vehicle to verify elimination of symptom. If manifold vacuum is still not okay, fault is in catalytic converter. Repair or replace as necessary. Check tailpipe/muffler assembly for debris from catalytic converter. Test drive vehicle to verify elimination of symptom.

Dam I got alot of test to run thur. You know It could use a turn up I think I did the plugs and fuel filter at 77k and I'm at a 102k now. I did the timming belt and water pump at 85k I think.
and I just did the clutch around 95k. And I just changed my oil recently. and well I thought sense the car was getting up in miles I should put some of the engine treatment stuff in with the oil. and I think this error came up about 300 miles after I did that. So maybe if I do another oil change and tune up that might make it go away. the test said the Oxygen sensor passed. But I'm sure it wont hurt to replace it.

Well if there are no other symptoms than just the light, it is not mandatory to go full bore and search immediately for the cause by all means. OK it tells to keep an eye on that matter...I'd endure for a little while and see what's next...if used mainly in city driving, I'd go for a run at highway speed. I do not consider this indication making the vehicle unserviceable...may be it would not pass the "clean air act" test....by a slight margin ..

Dam I got alot of test to run thur. You know It could use a turn up I think I did the plugs and fuel filter at 77k and I'm at a 102k now. I did the timming belt and water pump at 85k I think.
and I just did the clutch around 95k. And I just changed my oil recently. and well I thought sense the car was getting up in miles I should put some of the engine treatment stuff in with the oil. and I think this error came up about 300 miles after I did that. So maybe if I do another oil change and tune up that might make it go away. the test said the Oxygen sensor passed. But I'm sure it wont hurt to replace it.

Go easy on the engine treatment stuff.
But look over the engine running stuff real good.
Running rich and or a miss fire will give a cat code.
Good Luck and let us know how it goes.

the weird thing happened today. I wanted to get over the train tracks before the things came donw so I gunned it to get thru. and then the freeway was right there. so after that the engine light when out. so I dont know if gunning it really hard to get thur the light blew what ever it was out or not but who knows. its now been about 1000 miles sense I put that stuff in with the oil change so it could all be now worked into the system now so it might be okay now. but I'm going to change the oil again soon just to be sure. I think in about another 500 miles. does that sound like a good Idea? I'm just shocked my O2 sensor has never been replaced yet and I'm still running good and I never get an error on that.