Driving and truck shuts down to limp mode

[pcravens]

Was driving and the Eletronic Throttle Control came up. Pulled over tried a few things but no change i did not have my scanner with me. I limped back home and parked it for 2 weeks. Got back home and pulled the codes P26A7 Engine coolant Bypass valve 1 position sensor circuit high , P2683 engine coolant bypass valve control circuit high , Po12D Turbocharger inlet pressor circuit high , P2455 Diesel Particulate filter pressure sensor high -pending , P2681 Engine coolant bypass valve control circuit open-pending , and U1428 Inaccurate Engine Torque received , Ok i cleared all codes truck starts up and is running fine go about 5 miles and then it does the same thing. Where do i need to look first something is triggering all these at the same time , i just dont want to start replacing a lot of parts. Thanks for any help you can give me or point me in the right direction.

 

[pcravens]

just pulled MAP sensor and EGR cross over pipe both in good shape very little soot on crossover pipe and MAP was clean

 

[BTdriver]

Are you losing any coolant? If so, my thought process is: Cracked EGR cooler sends coolant through the crossover tube, steam cleaning it and the MAP sensor (and the intake manifold some). This causes bubbles in your cooling system, affecting the coolant bypass valve (on passenger frame rail under air filter box). The coolant goes through the engine causing power loss, unusual readings at the turbo inlet pressure sensor and increased deposits in the DPF. OR, your turbo coolant tube (under the intake manifold) has ruptured and needs R² (big job).
Check oil for any signs of milkiness, coolant level, and, if low, pressure test cooling system to find leak. If none of these signs are present, try looking at electrical faults - connectors and wiring.

 

[pcravens]

The coolant bypass valve P26A7 , P2683, P2681, were all coming on a few days before I had any Electronic Throttle Control issues coming up. I had ordered a new coolant bypass valve but had not came in yet. I had the coolant level marked on my burp tank and it has not changed. The coolant bypass valve is supposed to be in today will change it out and hope all other issues go away.