Buick enclave 2009 fuel trim

Hello people it is a normal when I have the short fuel trim and the long fuel trim at 0% they don’t move are always in 0% y tried increase the rpm , no changes thanks 

check front o2 sensors if they're oscillating 0-1V range usually means it's in fuel control and check loop status.

They are in 4.5 v and 4.4 v

are you looking at the Module Signal PID by any chance?

 

I mean I have these codes : P0135 , P0155 , P0031 , P0051 ,
P0030 and P0050 . I’m not sure if my O2 sensors are lying or I have another problem. Thanks

DTC P0030:  HO2S Heater Control Circuit Bank 1 Sensor 1
DTC P0031:  HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 1
DTC P0050:  HO2S Heater Control Circuit Bank 2 Sensor 1
DTC P0051:  HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 1
The ECM detects an open in the heater circuits of the HO2S when the heater is commanded OFF. The condition exists for greater than 4 seconds or a cumulative of 30 seconds.
The ECM detects a short to ground in the heater circuits of the HO2S when the heater is commanded OFF. The condition exists for greater than 4 seconds or a cumulative of 30 seconds.

Check the EMISSION 1 fuse. If it's blown, check for a short to ground.

Ok thanks very much bro