2002 with 445k has constant 3060 code Original cat converter. Stumbles and misses out. Replaced plugs and wires. No change. When code is cleared , reappears immediately Thanks
It's always helpful to include the P, C, B, or U at the front of the code; it's part of the code. Assuming it's a P, I only find one P3060 for Gen 1, and it is a problem with the temperature sensor inside the traction battery. It wouldn't have much to do with engine stumbling. How are you reading the codes?
I think there are about five of them, poked into the sensor wells of a few of the 38 modules. One of them might just be under the module stack, sensing the "inhaling air".
