i have prius with alot of kilometers(600.000km) but in verry good condition. My car with LPG system to. With scanner found P2195 code ""P2195 Code, bank 1 sensor 1 stuck lean""" Thats mean oxygen sensor? but i dont have Any problem with engine, working like New! fuel consuption 4.3l(liter in Europe..) and still all horses under bonnet, With faulty oxygen sensor some engines need 2x fuel, but not this time.. Maybe somebody have clue why i have this code?
You usually don’t see mileage differences with modern Toyota engines. That’s the upstream sensor in the exhaust manifold. The expensive one. When you replace it, stick with a factory sensor, not aftermarket.
