P CODES (POWERTRAIN) P0400 - P0499 P0430 Questions

These Codes, P0420 And P0430, I.e. Both Catalyst Converters In The System Show Efficiency Below Threshold, Showed Up Today. The Engine...

Hello There.. I Have A 1997 C1500 2wd Pickup In Which The Check Engine Light Is On. The Code Reported From My Handy Dandy Obdii Reader Is...

Catalyst System Efficiency Below Threshold Bank 2. How Would You Start To Pin-point This?

P0430 Says Catalyst System Efficency Below Threshold Bank 2.

Engine Light Came On And Car Started Running Very Rough. Was Low On Oil. Had Oil Changed And Fuel System Flushed. Car Ran For 1 Day And...

Got P0420 And P0430 Codes. Mechanic Replaced All 4 Sensors And Clean Out Catalytic Converter. Check Engine Light Returned. A Different...

I Scanned My Truck The Other Day At Shucks Due To Check Engine Light Being On And Got P0430, Catalytic System Efficiancy Below Threshold...

I Have A 97 Thunderbird 4.6 V8 With 94,000 Mi.on It That Have Po420 Po430 Po171 An Po174 Code It Idles Good But On Accelertion Hard From 40...

P0430 Catalyst System Efficiency Below Threshold,right Bank What Does Mead

I Got A P0430 Code And I Used My Scanner To See What Was Going On And My O2 Sensor Labeled O2s12 Shows A Very Very Low Reading At Idle...