I just got a P0156 code come up today, I looked it up here and that's bank 2 (passemger side) after the cat.

Several posts on here and on other forums say it could just be the wiring thought, not the actual sensor.

Anyone had any experience with this code being something other than the sensor itself?

I'm not about to go drop a bunch of $$ at the stealership for a new sensor if it's a common wiring issie or even just a dirty sensor that can be cleaned etc.


I did have a P0421 code about 600 miles ago that was on when I got the car. I did an oil change, bottle of injector cleaner and I checked and wiggled a few vac hoses tighter and re-set the code, since then it had not returned.

Could that be related to the P0156?

 

I reset the P0156 and 24hrs later and 50 miles, it is not back.

Is this a code that comes and goes for some people?
Intermittent wiring fault maybe?

 

If you want to check the sensor, then there is a simple circuit check that you can perform. I posted a link in the forum. I am too lazy to look it up. Do a search.