nappypalms

P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1

I am getting this code with a check engine light.

I have tried cleaning the MAF sensor, replacing my pvc valve and grommet.

Does anyone know which o2 sensor needs to be replaced for this code?

Thanks.

flash20

i got that light earlier this week. i changed my o2 sensors and it worked fine