Review on 🔧 Enhanced Denso 234-4012 Oxygen Sensor, Upgraded Version by Micheal Wright

I replaced all four oxygen sensors on my 2000 Chevy Silverado with 325,000 miles. I wish I had done that sooner. It wasn't as difficult as I thought. I needed a special socket and a short jumper, but all the old sensors fit, not bad. From the outside it looked like a rusty nightmare but the threads were in great condition. One of the connectors was in a terrible place, but I finally figured it out. My mileage has increased. I went through the ejects. Fixed codes P0420 and P0430. I didn't have to change the catalytic converter. Fun discovery: I thought the wires would be better protected if I put a protective sleeve on the end of the sensor. It looked good. But I drove for weeks and couldn't reset the diagnostic monitors. After some more research I found out that O2 sensors need fresh air from outside to compare to inside. You get this air through the small gaps where the wires enter. Do not get grease or anti-seize agent inside. I pulled the bushings from the sensor housings. I didn't imagine it was a problem, but the monitors reset almost immediately on the next ride.