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Check the continuity of the Red and Black wires, between the Throttle Actuator Motor (TAC) and the Powertrain Control Module (PCM). Wiggle and twist the wires and connector to these circuits while testing their continuity. Trouble codes P1125 and P1295 indicate the PCM is in default mode. Repair the cause of code P1515 first. This code indicates the PCM sent a command to move the throttle, but it didn't see an increase in the throttle angle. We have had several problems on these vehicles due to wire harness faults. If you replace the harness, problem should be solved.....Otherwise you will need to test wiring and replace wire as needed. Let me know if you run into questions, thanks.