My 2008 Pilot, the scanner said code P0172, so I put in a new pair of upstream sensors, and there was no code for a day. However the check engine light came on again with the same code. What next? I was very hopeful that it was the sensor Bank I Sensor 1. Need help!

 

If you replaced the sensors then it could be a leaking fuel injector? Any other problems to pinpoint it better?

 

How do I check for a leaking injector?