i had my cel checked last night and it turns out i have 3 codes and cant pass emissions...P0138....P0171......P0174..does any body know what these are and how to fix em so i can pass emissions
THX

 

16522 - P0138 O2 Sensor Circ.,Bank1-Sensor2 High Voltage
16555 - P0171 Fuel Trim,Bank1 System too Lean
16558 - P0174 Fuel Trim,Bank2 System too Lean

P0138 - check wiring to post-cat O2 sensor on passenger side. You may need new sensor.
P0171 and P0174, you're running lean. This is most likely due to a vacuum leak, but it could also be a bad MAF, O2 sensor or clogged injector, fuel filter, or fuel pump going bad.

How many miles on it? When was the last time the fuel filter was changed?

I'd start with the O2 sensors in any case.

 

Clean your MAF like I said, then check your vacuum lines.