Diagnostics capabilities, lack thereof, Fact or Fiction

My new 2024 Tundra is still at the dealer (4 days so far) see the link below.

The dealer called this morning and told me that they continue driving the truck daily to replicate the previous reduced engine power failure and fault codes. I asked why the previous diagnostics did not tell them what the issue was.

I was told that they must be driving the truck when the reduced power event occurs to determine the exact fault. I asked why Toyota could not look at the current logs and was told it does not tell them anything unless they are monitoring it when it fails. I can't believe that Toyota corporate cannot look at the detailed logs from memory and determine the cause of the fault.

Is there no way to diagnose the fault unless they are driving it with the analyzer connected when the fault occurs? I can't believe this!

If it is true is there an after-market analyzer that I can leave plugged in and read the codes before turning it off? Will there be any more detailed information provided beyond the codes already provided? Is there ECU memory dump function?

Maybe Toyota should provide an analyzer with each new Tundra if this is the case.

This just makes me so mad. 65k investment to pull my new Airstream and there is now absolutely no confidence in doing so. Towing frequently throughout the CO high country passes it would be incredibly dangerous to have the truck suddenly shut down.

https://www.tundras.com/threads/help-check-engine-reduced-engine-power.138468/

 

that doesn't sound right, the codes are usually stored for a while once they light up the dash.

@ryanwgregg

am I wrong on the code being stored after it lights up?