Check Engine light is on and i have the codes

i was drivin around last night my car was fine....i get on the highway and doin like 75-80 and all the sudden my check engine light comes on.....so when i got home i put my code reader on it and the codes are

P0134
o2 Sensor CKT No Activity (Bank 1 Sensor 1)

P0138
o2 Sensor Circuit High Volts (Bank 1 Sensor 2)

can anybody please help me i don't understand it was fine and all the sudden check engine light is on

i was drivin around last night my car was fine....i get on the highway and doin like 75-80 and all the sudden my check engine light comes on.....so when i got home i put my code reader on it and the codes are

P0134
o2 Sensor CKT No Activity (Bank 1 Sensor 1)

P0138
o2 Sensor Circuit High Volts (Bank 1 Sensor 2)

can anybody please help me i don't understand it was fine and all the sudden check engine light is on

if u r getting those codes means is the oxygen sensor now

before going to buy it check the wire harness that connects to the sensor to make sure is tight

but is normal for oxygen sensors to go bad after a period of time

get the repair manual from haynes there will tell u how to test it
to make sure is the sensor

if it tests bad then is the sensor

it runs like for 70 bucks at ur local autozone

but try to get the original kind oem