Boost Engine Efficiency A Comprehensive Guide to Changing O2 Sensors

In theory, it's relatively simple to replace a bad O2 sensor. They are typically connected to the vehicle's wiring harness by a single plug and ... There's usually a primary O2 in front of the cat/OPF and secondary one after it, both in the same housing. They should be easy to spot. It is a good idea to let your car sit with the battery disconnected for at least half an hour, this will reset the computer allowing your O2 ... Loosen the O2 Sensor from the under the car. You will need several long socket extensions, a Universal joint (preferability 1/2 inch, not 3/8) and an impact ... You'll find all kinds of anecdotal evidence that replacing your O2 sensor can improve mileage, but in the end, "it depends"; YMMV (no pun intended.) The Toyota AFR sensors go bad somewhere between 120K - 200K+ miles. There will be mostly poor fuel economy coupled with a correlated degradation in proper fuel ... O2 sensor is an emission system part. If their contention is that the sensor is good but can't be safely removed and replaced without damage ... First, simply jack up the car and secure it safely with a pair of jackstands. You can put the stands under the subframes, engine crossmember, or other secure ... No photo description available. Michael ... Both connectors are designed to fit only one way so you can't get it wrong....but be sure to push then firmly together to get them completely ...