I recently had the CEL come on and I took to the shop and they read these two codes. Said I needed to replace the O2 Sensor in bank one. I changed that and CEL still came on after clearing the codes. Then I check the LAF fuse that powers the O2 Sensor and CEL still came on. Then I replaced the gas cap. CEL still on. I'm super confused and not sure what else I can do to get rid of these codes. Is there anyone that can help?