AutoServiceCosts says oxygen sensor replacement costs about $296 with average prices ranging from $113 to $478 to have a professional mechanic replace your O2 sensors. Their guide states that you can save money by replacing your oxygen sensors yourself and only spend around $20 to $94.
Can O2 sensor cause transmission problems?
A faulty oxygen sensor will cause the engine to run less efficiently (use more gas than usual) and may degrade engine performance to some extent. However, failure of the oxygen sensor itself can not cause the transmission to fail or operate poorly.
Can you clean a oxygen sensor?
No, despite what you might have heard or read, such sensors should be replaced when they become faulty.
Can spark plugs cause O2 sensor code?
Bad Spark Plug, Wire, or Fuel Injector
Any of these can cause one or more cylinders to misfire. Because the oxygen in that cylinder isn't burned up, the extra oxygen in that cylinder winds up passing over the O2 sensor. This makes the computer think it's not injecting enough fuel.