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Have a P0430-C code that I have cleared twice to make sure it wasn't just a gimmick. The first time it stayed off about 2 weeks and the second time it reappeared after two days. Could somebody look at this and say whether it is the cat or the 02 sensor? Truck is a 3.5 eco with 140k that sees mostly in town driving. Any help appreciated!
P0430-c
