Reduced Engine Power only when cold

I own the car listed above LT model. The car has ran perfectly for the first two years I had in, however, during the last two winters when it gets below 32 degrees Fahrenheit, my car will pop up a reduced engine power warning sign, service traction control and service stabatrak. Once the weather warms up it quits doing this all together and only happens again once it’s cold (below 32 degrees). I have, within the past month replaced the air filter, changed the oil and put Heet in my tank at every fill up. Obviously these aren’t working. When the reduced engine light comes on, the codes that read out are -
- P0106 - Manifold Absolute Pressure
- P0131 - O2 Censor circuit low voltage
- P0171 x2 - System too lean
- P0300 - Random Multiple Cylinder Misfire
- P2135 X3 - Pedal position sensor

The only code that keeps adding every time it reads is the P2135, the pedal position sensor. If anyone has any insight to what this might be I’d so appreciate your help. I’ve read in the forums before about similar things happening but they did not have codes or anything to tell you guys what was coming up. And also people saying the cold is not a factor but in my case I know 100% it is a factor. I’d rather replace the pedal position sensor myself rather than having to buy a brand new throttle body to start out with.

Thank you in advance for any help I can get.