it's just above the front cat.
The O2 sensor on a Toyota Corolla is located on the exhaust manifold. The O2 sensor properly reads the air fuel ratio to tell the engine how much fuel to use.
air fuel ratio sensors are in the exhaust-they are like oxygen sensors but work differently
if its a 4 cyl. there is an oxygen sensor screwed into the exhaust pipe under the drivers seat area. there is also an air fuel ratio sensor screwed into the exhaust manifold. for that one just open the hood, its almost looking right at you.
i have check engine light on code po171 system to lean i changed o2 sensor check engine light came back soon after, i heard that it could be fuel air ratio sensor,where is it located on 6cyl Toyota sienna, do you have any input thanks tony
There are two air fuel ratio sensors. One is located on the front exhaust manifold (facing the radiator & easy to get to) and the other is on the rear exhaust manifold (firewall side & difficult to get to).
You probably put an O2 sensor where you should have an Air ratio sensor, they are different they only look similar but they are different internally.
if its a 4 cyl. there is an oxygen sensor screwed into the exhaust pipe under the drivers seat area. there is also an air fuel ratio sensor screwed into the exhaust manifold. for that one just open the hood, its almost looking right at you.
Yes P1135 is an Air Fuel Ratio sensor which in order to get the correct part you have to buy from the dealer and its about $230. I have the same issue with My Camry with has the same motor as your Rav 4. BUT I changed my air fuel ratio sensor and the light came right back on in about 60 miles with the same exact code so I don't know what to trouble shoot and try next....
The sensor between the cat and the engine is the air fuel ratio sensor, it looks like an o2 sensor. The o2 sensor is between the cat and the tail pipe. The forward sensor is the af sensor t he rear one is the o2 sensor. Thar answer is for the calif. vehicles. Fed may be different but I dont think the 4 runner had two o2s like some of the sedans. fairly visable tho.
P1130 indicates an Air/Fuel Ratio Sensor Circuit Range/Performance Malfunction Bank 1 Sensor 1. Problems could be a faulty air fuel ratio, the sensor harness is shorted, the sensor has a poor electrical connection, a fuel pressure problem, a fuel injector issue, or air leaks in the intake.
According to the Haynes manual for 98 Toyota tacoma, and a mechanic i just visited, two. One on each side of catalytic converter. correction, there are two sensors, the first is an air fuel ratio sensor, and the second is the oxegen sensor. i know cause i had to replace both of them. opie909
the stock Toyota gear ratio is 4.11