89 740 non turbo failed cal emission test

CO(%) Max .72 Ave .10 Meas .89 at 15 MPH 2341 RMP Failed
CO(%) Max .60 Ave .09 Meas 1.25 at 25 mph 2279 RMP Failed

HC (ppm) Max 112 Ave 31 Meas 82 at 15 mph
HC (ppm) Max 86 Ave 20 Meas 82 at 25 mph)

NO (PPM) Max 778 Ave 37 Meas 0461 at 15 mph
NO (PPM) Max 717 Ave 99 Meas 0519 at 25 mph


I check for a Oxygen Sensor and can't it on the exchust manifold

I need help
Thank you

Al

Yours should have an O2 sensor either up towards the front or more to the rear.

I"ll look again , couldthere be something else that would cause it to fail like this

from under car look up high, mounted upside down into exhaust manifold back of block - follow the wires above oil filter area.
I failed mine too, replaced the cat @ $130. and O2 @ $90. Rechecked and passed like a new Prius.