EGT #1 issue

I am receiving an ELT # 1 error and a flashing Lane A. I pulled the ECU logs and have the flowing information:

Engine Speed 2484.02

Timestamp 209650 (00:03:29)

ECU Run Time 1.78624e+006

FC_Class 4: EGT

FC_Type 1: Cylinder 1

FC_Test 3: EGT Sensor Fault

FC_Error 7: Sensor Step Fault

Fault Reading 645.99

SSW: Warning Lamp State 1: Fault

I replaced #1 EGT with a New EGT. Got the same error.

I then swapped the EGT’s. Put the new EGT in Cyl 2 and the EGT in Cly 2 in Cyl 1. I still got an error on cylinder #1. I concluded that the error is not a faulty EGT because I expected the issue to move to Cylinder 2

Help