well my car is having some problems
when turning the key to start, it fails to start, takes like 2-3 turns in order for it to start
this is on cold starts, turns on real quick after its on for awhile though

then after a couple days of having that problem, then sometimes it turns right on, on the first try but just bogs down immediately after,

and then i had the CEL come on
it threw these codes

P0136 Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2)

P0137 Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 2)

so what can i do in order to fix my problem?
buy and install a new o2 sensor?

much needed help plz, dont feel like being stranded or anything anywhere
would be appreciated

 

I would start with what you said, replacing the oxygen sensor. Of course, inspecting the wires to it first.

 

If you're looking to purchase the parts independently of a dealership, gmpartsdirect.com might be a good place to check for the sensor. Keep us posted on your progress, and if you decide to work with a dealership please let me know as I would like to be available to assist in whatever way I can!

Best,
Sarah
GM Customer Service