Starts fine and runs for about a mile the goes to reduced power.

Question

The truck starts and runs fine for about a mile then switches to reduced power. Turn it off for a few minutes and it will do the same thing again. P0068 and P0017 codes.

Answer 1

P0068 MAF (mass air flow) -throttle position correlation

P0017 Crankshaft-camshaft postion

P0068 detects the airflow rate when more than expected P0068 sets which also commands TAC system to operate in reduced engine power mode.P0068 is a rational code, it was set as a result of P0017, Crankshaft to camshaft position correlation.The camshaft actuator solenoid is stuck open,which is a popular failure on the Colorado due to lack of oil change maintance,which can be clean with brake fluid and reinstalled, or the camshaft actuator is stuck in a position other than 0.This will require a replacement.