What sort of possible problems can attributed to engine light for uplink O2 sensor going off?

Question

The engine light is on and I had it checked with Autozone for uplink sensor which is the sensor that measures the O2 coming out of the engine and into the exhaust.
Additional information: it is a 2001 Hyundai Tiburon 2 litter engine.

Answer 1

the upSTREAM o2 sensor is before the cat. conv. probably in the exhaust manifold..it's a common problem on hyundais. go ahead and get one and replace it

Answer 2

If auto zone gave you a code for a bad 02 sensor it will be best to replace them both, their is one on the engine and one near the converter located on the exhaust.