02 sensor replacement

Usually these are located on the exhaust manifold or just below the exhaust manifold and you should be able to see it in the engine bay. On V6 engines there will be one sensor on each of the 2 exhaust banks.
You will probably need to remove the engine cover to see the sensors on your exhaust.

If someone told you to replace these because you got a particular fault code I would be wary. A decent scan tool and basic diagnostics can show if the 02 sensor is working or not. Some faults often blamed on an 02 sensor are not due to faulty sensors.

I doubt you have sludge in your engine since oil has detergent in it to prevent this. I would stay away from this dealer.

I have a 2006 Hyundai Sonata GLS V6. I was told there's 2 on my vehicle. Is that true? If so does anyone know where they both are? Thanks guys!

time to get the engine properly scanned, real time not code scanner, then you will have the readings from sensore and actuators, diagnose from there

theres a fuel pump relay in the power distribution box under the hook you manuel should tell u wich one

You just need to replace the sensors. If you are mechanically inclined, you can do it yourself. If you don't feel comfortable working on an expensive transmission, take it to the dealer.

The turbine shaft speed sensor can cause this problem, It is also know as the transmission input shaft speed sensor. It will cause the transmission to **** and also stick in 3rd gear, which wound cause slow acceleration.

try to change your fuel grade and see

I had to go to a Hyundai dealer to get them synchronised with the vehicle's remote sensore chip. cost me $20 added on to the purchase price.