Fault Code P0155

[APBoyd]

My Toyota Avensis Vermont 2001 is showing a fault code P0155 O2 heater circuit bank 2 sensor 1. Can anyone tell me which sensor this refers to please?

[Beagh1958]

You do not give engine cc, but they should be the same. Error code is for your 1st Oxygen sensor in manifold before Cat, so as you look at heat shield over manifold it is sensor that goes through heat shield into manifold. Also it can be wiring or ECM fault.

[APBoyd]

Sorry about that, its is a 1.8 vvti if that makes any difference. Thanks for the advice.

[Beagh1958]

Still the same faults showing. Hope this helps.

[slarti54]

Yup, oxygen sensor.