Engine shutdown at 75 miles per hour, no trouble codes

It's the Nox sensors, take it to the dealer ASAP. My old truck had that problem due to. It keeping the def tank full. Running the def tank out dry will cause these problems and the urea will dry and cause def quality poor which will cause the p22a7 code. You have 200 miles of the warning light and then you will be limited to 55 mph and after another 200 miles 5 mph limiter. You will probably ether pay $1000 of fixing this issue that will return or pay $2000 and deleting it

Take to one of the big car parts stores and ask them to scan the trouble codes.

About 12 hours and 9 minutes.

Check for intake leaks, intake hose leaks, check mass air flow sensor.
02 sensors will keep setting off a lean code until the air problem is fixed.

Sounds like who ever did the work on your car needs to go back and check the plug wires to see if they are going to the right plugs. and check the fuel filter, and fuel pump pressure. I would also check the Catalytic Converter to see if it is stopped up, if so replace it. Check the throttle position sensor with an ohm meter, if bad replace it. Check the oxygen sensors as well. I am running out of Ideas, so I hope this helps.

When you say it loses power, do you mean electrical power or engine power ?
You would need to look at the fuse boxes for a loss of electrical power, and use a scanner or code reader to check the computer for trouble codes for a loss of engine power.

Have you had the computer checked for trouble codes yet ?

engine? the maintenance schedule says every 30K miles. I would follow that, and use top quality coolant.

The engine light means that the computer has stored a trouble code which can be retrieved with a scan tool. Some part stores will check these codes for free and might be able to suggest a possible cause for the code or codes. If the codes indicate a lean condition, then check fuel pressure.

What are the fault codes you read.