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It is a real pain. My suggestion is to take it to a shop.
need change knock sensor 2 bank 2 in 2000 lexus rx300
Trouble code P0175 means:System too rich (Bank 2)
Trouble code P0430 means: Catalyst Efficiency Below Normal (Bank 2)
It's the sensor under the passenger seat near your Y pipe. (The IS has 4 sensors.....3 near the engine, and this one) Unscrew it (VERY hard to get off) then cut the wires. Splice the wires from a new one, solder, heat shring wrap it, disconnect battery to reset ecu, and you are good to go.
bank 2 sensor 1 is before catalytic converter
vvtls400
Passenger side exhaust
A/F Sensor for Bank 2 Sensor 1. It is the O2 sensor on the front manifold.
It is caused by Bank 2 Sensor 2 oxygen sensor failing.
In the gas tank
Trouble code P0135 means:O2 sensor heater circuit malfunction (Bank 1 Sensor 1)