Check Engine Light Due to Failed Oxygen Sensor on Toyota Solara

Problem Description and Possible Solution

The Check Engine Light may illuminate because a component of the oxygen sensor stops working. As a result the engine computer is unable to determine the proper ratio of air to fuel for the engine. Replacing the failed oxygen sensor should correct this concern.

Problem Data
RepairPal Verified
Average mileage: 126,493 (26,000–260,000)
10 model years affected: 1999, 2000, 2001, 2002, more2003, 2004, 2005, 2006, 2007, 2008
93 people reported this problem
Viewing 1 - 20 of 32 comments
Check engine light came on so I went to get it checked out. The machine read that it was my oxygen sensor so I got that problem fix however, a week later the check engine light came back on and it is reading the same thing.
I'm being told by the local repair shop that the check engine light is due to a failed downstream oxygen sensor, and that the part is over $100, with the total cost of the repair at $250-ish. I find the price for the new part online ranges from $40 on up. How hard can it be to unplug the old sensor at two ends and plug in the new one?
I have had the O2 sensor changed 3 times, but this problem keeps occuring. I am now keeping the same 02 sensor and just dealing with the light.
My check engine light was coming on so I took it to a local AutoZone. They read the engine diagnose and told me the code for o2 sensor was coming up. I bought the part for about $150-200 and installed it myself.
My check engine light went on for a while now. I put the car on the machine to check it and they told me to change my oxygen sensor.
have changed the sensor twice in a year and this time was informed my car has 4 oxygen sensors. what do I do.
Yes, it's common. Once one sensor goes the other one goes shortly. It cost me $600 for front one, next day the light went on again, had to get the rear sensor replaced.
In both cases failure of original and next unit, was faulty sensor heater element, do not use dealer old stock to replace sensor buy new from CA, from newly produced stock. We feel defect in old sensors and replacements, 3rd one replaced so far same car. purchase parts from if doing job yourself, it is hard to get to sensor is located in rear of engine, but can be seen. This is my 3rd sensor for this car
I bought my 2000 Solara with 113,000 miles on it. Not long after I bought it the check engine light came on. In all honesty I have never wanted to spend the money to have it diagnosed. I now have 264,000 miles on my car, it still runs good, idles great, gets 26mpg and I'm just not going to waste time fixing a sensor that isn't as relaiable as the system it's supposed to monitor. Does anyone know if the computer for this year model really uses oxygen sensor data to adjust the fuel/air ratio? Please don't just arbitrarily say it does without knowing for a fact it does because as I said, my car runs great and gets the mileage it is supposed to get. Thanks!
I was driving and the light just popped on no noise no problems with the car at all. Problem has not been corrected yet
The first time at 105,000 miles, my local mechanic replaced all of the O2 sensors. I don't remember the cost since it was so long ago, but it was a lot (for me anyway). I have not have them replaced this time (yet) (at 170,000 miles). Replacing two of the sensors was estimated at $600. I was told that my gas mileage would be affected, and it has. Was trying to figure out a less expensive way to replace all of them because the first time I was told that when one goes, the others will go as well.