Check engine light P0440 code. Car in shop 4 times in 4 mos for same problem

Please find another shop, a P0440 is an Evaporative System code for a large leak and has nothing to do with the oxygen sensors. http://repairpal.com/OBD-II-Code-P0440 here is an article that I wrote about how to deal with a P0440 code. I do emissions diagnosis and repair work for a living, so I have to deal with these codes on a daily basis in California. If this happened in my area, the State Bureau of Auto Repair would force this shop to give back all the money for charging for a non-repair. here are some shops: Go to shop that does State of Texas Emissions Inspections AND Repairs. Best of luck! https://repairpal.com/toyota-repair-in-midland-texas