Review on ๐ง Enhance Engine Performance with Denso 234-9108 Air Fuel Sensor by Roman Niko
My code was that the O2 heater circuit wasn't working (or something), so I assumed the O2 sensor wasn't working.
It worked as advertised on my 2011 Subaru WRX. But for me it turned out that I should have done more research because the real problem was the fuse under the passenger side dash. Fuses for O2 sensors are not found in regular fuse boxes so check them before ordering. My code was that the oxygen heater circuit wasn't working (or something), so I assumed the oxygen sensor had failed (70,000 miles). Don't think - check your backup - as soon as you find it!
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