Review on 🔥 Denso 234-9012 Air-Fuel Ratio Sensor | 4-Wire | Direct Fit | Heated | 7.09” Wire Length by Brian Cooper

September 09, 2022

Great quality sensor

I spilled BG 44K fuel system cleaner before replacing the sensor. Code changed from P0136 O2 Circuit (Bank 1 Sensor 2 - Firewall Side of Toyota Sienna 09 Engine) to P0031 Heater Control Circuit Low (Bank 1 Sensor 1, Firewall Side Before Catalytic Converter). I unplugged the sensor connector and tested the heater circuit by setting the multimeter to ohms and it showed an open. Sensor ordered and installed. I reset the code and it didn't come back. Saved over $40 compared to the parts store.

Pros

Great price

Cons

Without machine

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