My code readers shows a code of P0051 on my Innova, and P0051 and P1168 on my Blue Driver. Both say 02 Heater Control Circuit Low Bank2 Sensor 1. Blue Driver also says Closed Loop Bank 2. What does all this mean? I replaced Bank 2 Sensor 1 already but codes return. I want to figure this out before I take it in. Al

 

Same here except bank 2 sensor 2. got a 1a auto 02 sensor still throwing code. going to buy a oem one and see if that helps.

 

Use Denso sensors.