LongTom
Junior Member
Hello everyone, I recently purchased a 2011 Ram 2500 5.7L 4x4 Crewcab Longbox with I believe 3:73's a few weeks ago. Truck has an engine code (P0420) for catalyst efficiency below threshold on bank 1. Truck feels a little underpowered for 390 HP and If i am absaloutley driving like a grandma at flat, no wind highway speeds, the computer says i am getting 12.5 MPG. Its way worse If im driving regularly. I understand the thing has the aerodynamics of a house and has got a chunky V8 inside, but I feel like It should be running a little nicer. Maybe its normal and these trucks normaly run like that. Could be wrong.
I did not buy the truck for the fuel efficiency, but man.
Recently replaced 02 sensors on bank 1, still no luck with the engine light. Im thinking the cat is not having a good time. Found a shop to cut the cats and add non-fowlers for a good price but am worried that deleting the cats would have some sort of negative impact. Maybe im wrong?
Is this the way to go? If anyone has any information or tips, it would be much appreciated. Thanks.
I did not buy the truck for the fuel efficiency, but man.
Recently replaced 02 sensors on bank 1, still no luck with the engine light. Im thinking the cat is not having a good time. Found a shop to cut the cats and add non-fowlers for a good price but am worried that deleting the cats would have some sort of negative impact. Maybe im wrong?
Is this the way to go? If anyone has any information or tips, it would be much appreciated. Thanks.