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I’m looking for advice testing and fixing stored and permanent codes. Truck is a 2013 Serria 2500 6.0L Vortec with 283737 miles. I have P0420 P0430 and P2097 codes using my live data I see both upstream and downstream sensor are fluctuating high and low is that defiantly saying the cats need to be changed ? Also P 2097 bank 1 high limit keeps coming back trying narrow down cause I will attach photos of freeze frame when code occurd some live data photos thank in advance
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- gmc serria
- 2500HD
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