I have a 2015 silverado and the engine will turn over and run but shuts down and will not turn over. I have pulled codes for the map and maf sensors as well as bank 1 and 2 and cat sensors not heating up. I'm leaning on both or one catalytic being clogged
What codes are you getting?
Well she's in the check cats so you didn't do is remove the oxygen sensor in front of them then put a pressure gauge on they sell those that all auto parts stores or pay a mechanic. If it has a bunch of back pressure like three PSI or higher than the cats are indeed clock and you can test one versus the other if you have dual exhaust
Clean both the MAF and MAP sensors. Check for continuity on the 02 sensors. The heating elements are the first thing to go out on those. New air filter would be a good idea too.
