Help Needed: No Crank, No Start Issue in 2012 Ford F-150 King Ranch 3.5 Ecoboost after Turbo Replacement

Ford F150 Forum
1

Could use some help!

My son was given a 2012 Ford F-150 King Ranch 3.5 Ecoboost. Previously belonged to his wife’s grandfather. Grandfather started the tear down to replace parts before his passing and receiving his heavenly reward. I replaced both turbos, installed a new starter, and a new battery. Then put the truck back together. The truck has power with no crank and no start. I checked all fuses and replaced faulty ones with still the same issue. I have the following DTC

P0299 Turbocharger/Supercharger Under boost

P0246 Turbo/Supercharger Waste gate Solenoid A High

P0741 Torque Converter Clutch Solenoid Circuit Performance Or Stuck Off

I DID NOT start the tear down. I just replaced the parts that were given with the truck.

ANY HELP IS GREATLY APPRECIATED

2

A 2012 F-150 King Ranch EcoBoost is a serious machine, and it sounds like you’ve got your hands full.

Those codes point towards turbo and transmission issues, which can be tricky. Given the truck’s history, it’s possible something got overlooked during the rebuild.

I’d recommend double-checking all the connections, hoses, and sensors related to the turbocharger system.

The P0741 code might be a red herring caused by the engine not starting. A professional scan tool with live data can be a lifesaver to pinpoint the exact problem.