You could, but it would be illegal along with causing the check engine light to come on, low power, poor fuel economy, etc.
It will not help the vehicle to run better.
Replace the Downstream O2 sensor (after the catalytic converter)
Down stream means it's after the catalytic converter.
The 2001 Nissan Frontier has 16 valves.
The 2001 Nissan Frontier has a 5-speed manual.
The 2001 Nissan Frontier has an inline 4 engine.
The 2001 Nissan Frontier is a gas-powered vehicle.
Crawl under the vehicle and look up. It is mounted in the exhaust system behind the engine.
The 2001 Nissan Frontier runs on regular unleaded.
The 2001 Nissan Frontier has double overhead cam (DOHC).
The height of the 2001 Nissan Frontier is 5 ft. 2.8 in. (62.8 in.).
The 2001 Nissan Frontier is 15 ft. 11.3 in. (191.3 in.) long.
The catalytic converter is found in the exhaust system between the engine and the muffler.