Where To Buy The Oxygen Sensor And Save Some $$$
You could buy the upstream oxygen sensor at your local neighborhood auto parts store (I won't name names but you know which ones I'm talking about) but if you call them and price it, you'll be in for a surprise since it's gonna' cost a lot more than the buying them online.
Check out the link below and compare:
Share Your Diagnostic And Repair Experience
I know that this tutorial doesn't cover all of the info anyone would ever need to diagnose a P0135: Bank 1 Sensor 1 Oxygen Sensor Heater Circuit Performance Problem .. so, if you want to add your own 2 cents worth, about how you diagnosed and repaired the issue on your Honda Accord (for the benefit of anyone that may be suffering the same symptoms your vehicle was), you can use the contact form below:
If this info saved the day, buy me a beer!