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2002 Lexus RX 300 - No nox

Both nox sensors are not working.

How do you know that? Which “both”? I think this car has four O2 sensors.

Your car doesn’t have nox sensors . . . however, it does have oxygen sensors, at least 3, probably even 4

And why are you so sure the sensors aren’t working?

And what is your definition of “not working” . . . ?

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Knock sensor failure is not unheard of on this vehicle, I suspect you have faults P0325/P0330.

Replacement is not cheap, a little over $1000. Also there is the possibility of rodent damage to the wiring harness under the intake manifold near the knock sensors.

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