Code p0137 is still showing

The code doesn't tell you what to replace, it tells you where to start troubleshooting. other possible issues - Rear Heated Oxygen Sensor Bank 1 harness is open or shorted Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection Inappropriate fuel pressure Faulty fuel injectors Intake air leaks may be faulty Exhaust gas leaks

You'll need to attach a On Board Diagnostic II code reader, to the OBDII plug-in, just under the front dash, driver's side. The code reader/scanner will tell you exactly what component has failed. Then replace that component. Then erase from your car's computer memory the code/codes that were stored. Most automotive supply stores will check the stored codes for you at no charge. They're hoping you will purchase the component/components required to fix your car. They may even erase the stored codes for you. If not repaired, and the codes are erased, the computer will store the problem codes again and the "check engine light" will come on again. Also, it's not a bad idea to purchase a code reader. Amazon is a good source. Hopefully this helps you.