O2 Sensor Ident?

[flateckers]

Hi guys , im hoping you can help me out. I have an o2 1.8 vvti avensis ,and also the management light. The car i want ,the light less so.i put it on comp and it coughed up ...P0155 o2 sensor heater circuit (bank 2 sensor 1). Called Mr T and he said that it had 3 all the same but did'nt know which one. As far as i can see 1 on o/s outlet manifold, 1 on n/s outlet manifold and 1 underneath on exhaust near cat.May be on wrong track , may have missed some. Which 1 am i changing? Can i try anything before changing anything? HELP? Thanks Flateckers.

[Bibbs]

That is very hard to read .. so I'm not sure what you are on about.

The error code should give you details about which O2 sensor is erroring (Primary / secondary).

I'd get a 2nd hand one from a scrappy, and then swap one and re-start the car.

If it's the pre heater it should be up to temp within 30 seconds.

If you've swapped the duff one, the ECL will not light. If it does, swap the next sensor.