What effects will a faulty o2 sensor have on a vehicles performanc?

Answer 1

I have an 02 Altima and if your getting a warning light saying the O2 sensor is bad, take it to a mechanic. Check to see if the engine is burning oil and check if the catalytic converter is clogged. Also check to make sure your car has received all of it recalls. One recall identifies that there is a defective hanger pin in the precatalyst which has been known to break and cause microscopic damage to the engine (due to its abnormal close proximity to the engine). Over time this damage leads to the engine burning oil which eventually leads to clogging of the catalyst which leads to overheating of the converter which leads to burning / melting of the o2 sensor. Solution: Possibly just a new sensor, possibly a new catalytic converter, possibly a new engine. I hope your problems don't go down that road; mine did right around 100k miles. Good luck.

-Never buying a Nissan again.

I have an 02 Altima and if your getting a warning light saying the O2 sensor is bad, take it to a mechanic. Check to see if the engine is burning oil and check if the catalytic converter is clogged. Also check to make sure your car has received all of it recalls. One recall identifies that there is a defective hanger pin in the precatalyst which has been known to break and cause microscopic damage to the engine (due to its abnormal close proximity to the engine). Over time this damage leads to the engine burning oil which eventually leads to clogging of the catalyst which leads to overheating of the converter which leads to burning / melting of the o2 sensor. Solution: Possibly just a new sensor, possibly a new catalytic converter, possibly a new engine. I hope your problems don't go down that road; mine did right around 100k miles. Good luck.

-Never buying a Nissan again.