O2 sensor ????

I keep getting code p0136 o2 sensor low voltage ( bank 1, sensor 2) have gotten conflicting reports as to which sensor it is some say post cat some say pre don't want to buy the wrong sensor as I don't have the money to waste.

 

Maybe just check if the sensor is bad first remember that code can mean any place in the complete circuit including the ECM

Down Stream Sensor Which would be the one closest to the rear bumper

 

how do I know if its bad?

 

https://www.tacomaworld.com/threads/addressing-some-common-misnomers-of-the-p0420-code.396763/

 

So how can he test the connector and sensor? see if it's getting 5 volts on the connector? physically checking the voltage?

would this method be valid?

 

Being Careful of the heat I just use my Meter and back probe the plug.

For myself I have a Special pig tail I can just plug into the O2 sensor harness that allows me to measure things quick.

Working on these vehicles it was worth the time to make one

Then it was not the PO420 Code but the PO136

 

is it possible the the p0136 code is a result of the previous evap code I cleared but never came back? I think it was p0440, not sure now.

 

no, the 2 systems are entirely unrelated.

 

except maybe by sharing the same electrical circuit and ecu.

 

maybe taking it back off the road, Toyota denied my claim for my frame