Questions & Answers for: how to tell if o2 sensor is bad

...O2 sensor. Idles really rough when first started up in the morning. Exhaust smells really gassy. After engine warms up runs great for the rest of the day. Is there 1 or 2 O2 sensors on this car? ...

tell me there are FOUR o2 sensors. 1 isnt working at all. one is spotty. are there really FOUR o2 sensors in an o2 montero sport? YES. but the dealer should have been able to tell which one was bad. I

...tell what the problem is,now,if the code for the o2 sensor comes on,this does not always mean,it is a bad o2 sensor,and most of the time it is not the o2 sensor,the o2 sensor tells lean,or rich ...

...four o2 sensor's, the code should tell you which one is bad for exsample code should be like, o2 sensor bank 1 sensor 1 or 2 o2 sensor bank 2 sensor 1 or 2 Also make sure you don't have a vacum

...o2 sensor cause this or could this be another problem? I also noticed that my temp. guage is not reading true, but is moving back and forth. Yes your o2 sensor could do this, it's most likely the ...

...o2 sensors are on the olds 88? How can I tell which one is bad if there's more than 1? Should I just replace all? Where is it/they located? My husband says he knows where 1 is, but not certain if ...

...o2 sensor is bad but tell me please which o2 sensor is bad .upstream or down stream sensor we located the mulfunction .its on o2 sensors but I am in doubt because I dont know which o2 sensor is bad ...

tell me o2 bank-1 sensor -1 where that located at on car.. thank you Bank one sensor one is on the side with cylinder one and before the catalytic converter. Please be aware the code is for the heater

...tell which one is bad? Can it affect the shifting of the transmission going into passing gear? The O2 sensor does exactly what the name suggests, it registers the amount of Oxygen in your exhaust and ...

tell which one of the 4 O2 sensors is bad and how do I test it ? I took the truck to the auto parts store and there was a code 13 came up. I googled it and it said that a O2 sensor was malfunctioning.