Review on 🔌 Denso 234-4622 Downstream Oxygen Sensor: Black, 4-Terminal Plug – Ultimate Efficiency by George Woods

After installation, the sensor worked fine, at least I thought so. Removing the old Toyota brand O2 sensor (ironically supplied by Denso) required a blowtorch, an adjustable wrench with vise (after cleaning the hex edges with various wrenches) and a pipe (to increase the torque arm, i.e. more leverage on the sensor). adjustable wrench with vice). After a few days of driving the engine code P0136 (lower O2 sensor fault) came back (Autozone checked the code in addition to my own code reader, bank 1 sensor 2). Browsing through automotive forums, the general consensus is that this code was indeed caused by a faulty upstream oxygen sensor (or air/fuel ratio sensor, bank 1, sensor 1), but in either case, both sensors should be replaced at the same time. Bought a DENSO 234-9022 air/fuel ratio sensor and installed it (it was easier to remove but be prepared to use a blowtorch, adjustable wrench with vise and pipe). I reconnected the battery and started the car. None of the engine code lights (Check Engine, 4WD, and Traction Control) were on, but my code reader said P0136 was still active. Went to Autozone, checked. None of the dashboard lights came on, but the error code was the same. I decided to run some errands since I wasn't home. After driving 60 miles around town and the freeway, I checked my codes when I got home. There are no gauges on the dashboard, no engine codes. So I'm definitely happy with my purchase and that all the afterburn sensors are new. I'll update when $H*+ hits the fan.