canyonwaters

I have the california version of this truck with both sensors and just had my INNOVA read code 27 with the comment "HO2S rear circuit"

I am not sure how to proceed from this point: How do I diagnosis what to do next after getting this code?

For one the rear sensor is very rusty (I have included the pic.) and judging from the comments above I am assuming I do not have enough information to go ahead and replace the sensor.

https://docs.google.com/file/d/0B4Tw...it?usp=sharing

Someone quoted some steps involving driving, idling. Could you possibly clarify this? I did not get how you would confirm a problem with the sensor or not (I will read it again).


Thank You everyone and good luck to the original post!

Joe

canyonwaters

[QUOTE=scope103;52052120]According to RockAuto, the Denso 234-4052 is only for the NON-California 1992-95 pickup/4runner. For the California model, the Denso number for the downstream sensor is 234-4154.

Thanks!

canyonwaters

What is supposed to happen during these steps to confirm it is a sensor or not? Forgive me if I am missing the obvious.

Thanks