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Es30 '96 Po135


tigerpilot
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Hi Folks...

Need some help.

Getting P0135. This indicates is a faulty O2 sensor, specifically, Heater Circuit Malfuntion.

The O2 sensor in question is located at Bank 1 Sensor 1.

Here's the question.

My Lexus manual says it's the sensor located just behind the radiator in the exhaust manifold. (Super easy to get at.)

Others say... This is the O2 sensor that is between the firewall and the engine. (Tough to get at.)

I changed the one by the radiator with a "generic" sensor and after about 25 miles the CEL came back on.

Do you think I changed the correct sensor and if so...are these generic sensors just 'junk?'

Thanks....

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