Thread: O2 sensor
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Old 09-27-2012, 09:48 AM   #4
 
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1sweetxd
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Join Date: Mar 2011
Location: Texas
Name: Evan
Age: 41
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Originally Posted by manonxd View Post
this is what the Repair manual says...P2195: Air Fuel Ratio (A/F) sensor (Bank 1) signal stuck lean.

A/F (air/fuel ratio sensor) sensor are a newer, if I can say, version of o2 sensors. much quicker to respond, more accurate and so on. o2 sensor are still used but after the catalitic converter (to mesure its efficiency).

it is the closest to the engine (starting from the cylinder head).

the more expensive one...but why don't you go OEM parts? I wouldn't skip on quality on this part. try to get a discount at the parts counter...tell them you will be shopping around..

---------- Post added at 10:20 PM ---------- Previous post was at 10:06 PM ----------

from my dealer experience, i have seen that a couple of time after a major overall, either from the coolant that went and contaminated the sensor or the tech bagging around the sensor ( left on the exhaust manifold for repair/replacement). the most frequent scenario is a blowned head gasket and coolant went in the engine and destroyed the sensor. Since they are running 2-trip logic, (has to happen twice and each time with a specific driving pattern and many condition met...) the car leaves the dealership without MIL on and a few days (depending on the customer driving habit) the light comes on.

thanks for the info! i'm still sorta confused on this whole thing. but your reasoning does explain why it may have failed. since i had to have the coolant system replaced, maybe that had something to do with it. i got on a website yesterday and the tech there was able to tell me that for that code, P2195, it should be the front driver side o2 sensor. at least now i know if it is the one before or after the catalytic converter. now that i know which part, i'm gonna go on the hunt.


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