2003 Chevrolet Tracker 2.5L V6 with codes P0123, P0102, P0174, and P0154

Question

My check engine light is on and we had a a diagnostic exam on my 2003 Chevy Tracker LT.
All of the codes that I stated above came up on the computer. We do not know which one is
causing the problem, or is it stating that all of these are a problem and need to be repaired.
Also would like to know where the PVC Vale is located on the engine of the same truck. The
Tracker is V6 2.5 Litter moto

Answer 1

P0102 CHEVROLET - Mass or Volume Air Flow Circuit Low Input
Read more: https://www.autocodes.com/p0102_chevrolet.html

P0123 CHEVROLET - Throttle Position Sensor Circuit High Voltage
Read more: https://www.autocodes.com/p0123_chevrolet.html

P0174 CHEVROLET - Fuel Trim System Lean Bank 2
Read more: https://www.autocodes.com/p0174_chevrolet.html

P0154 CHEVROLET - HO2S Circuit Insufficient Activity Bank 2 Sensor 1
Read more: https://www.autocodes.com/p0154_chevrolet.html