A code P0430 may mean that one or more of the following has happened:
If the Ox sensor has never been replaced I would do that.. Its a lot cheaper than the CAT. The one that needs to be replaced is AFTER the Catalytic Converter.
A good shop should be able to tell if this is your issue or not though.
TRY AND GET AHOLD OF A SCANNER SO YOU CAN WATCH LIVE DATA ON THAT O2 SENSOR, IF NOT GET A INFARED TEMP. GUN AND WITH THE CAR AT NORMAL OPERATING TEMP. TAKE THE TEMP. ON THE INLET OF THE CAT AND THEN ON THE OUTLET OF THE CAT IT SHOULD BE 30-80 DEGREESE HOTTER ON THE OUTLET. CAR IDLING WHEN DOING THIS TEST. IF IT IS THE SAME OR COLDER THAN THE CAT IS NOT WORKING.
Po660 means "Intake Manifold Tuning Valve Control Circuit/Open".it't means as same as "Engine Light ON (or Service Engine Soon Warning Light".The Intake Manifold Tuning Valve (IMTV) system is monitored for failure during continuous, key ON engine OFF or key ON engine running self-test. The test fails when the signal on the monitor pin is more or less than an the expected calibrated range
what is the reason?
1,IMTV signal circuit open, shorted to power or ground.
2, Damaged IMTV actuator.
3,Damaged PCM.
you may learn more definition about Diagnostic Trouble Code (DTC) at:
http://www.uobd2.com/upload/service/diagnostic-trouble-code-table.pdf
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