P0449 - Evap vent solenoid circuit.
P0014 - Variable camshaft timing.
P2135 - Throttle bodyperformance.
P2138 - Accelerator pedal position sensor.
P0641 - 5 volt refrence circuit.
C0040 - ABS brake circuit.
C0455 - ABS brake circuit.
C0131 - ABS brake circuit.
C0244 - EBCM control valve.
U1064 - Serial Data Class 2 Communication malfunction.
U1016 - Serial Data Class 2 Communication malfunction.
Codes P2135, P2138 and P0641 may all be related and can cause the Reduced Power message.
Code P0014 could also cause a Reduced Power message but for a different reason.
I would recommend focusing on these for starters. They are more likely to resolve whatever issue you intend to fix and fixing these may fix some of the other codes. The 'C' codes are all ABS brake related, we can address those seperately if you would like. That would require a new question post.